What Congressional Resolutions Mean for the War in Iran
Both chambers of Congress have now crossed an important Rubicon in opposing the war in Iran. On May 19, the Senate voted 50-47 to discharge a joint resolution directing President Trump to withdraw U.S. armed forces from hostilities in Iran from committee, the first step toward passage. The next day, the House’s Republican leadership postponed a scheduled vote on a similar concurrent resolution out of apparent concerns that it had enough support to pass. Those concerns proved prescient last week when, on June 3, the House finally voted 215-208 to pass the concurrent resolution. Now the measure moves to the Senate, which is expected to vote on both it and the joint resolution it discharged on May 19 in the coming days and weeks.
The fact that majorities in both chambers of Congress have now voted to severely curtail U.S. military operations against Iran is undoubtedly a major political loss for the Trump administration. But what it means legally is a harder question. A joint resolution that makes it through both chambers is almost certain to be vetoed by the president and seems unlikely to have the two-thirds support necessary to override. A concurrent resolution, meanwhile, won’t be subject to a presidential veto but will also lack the force of law. And while the War Powers Resolution instructs the president to withdraw U.S. armed forces from hostilities where a concurrent resolution so directs, most believe this provision to be unconstitutional. For these reasons, many observers—including the present author—have often framed such resolutions as being of more political than legal consequence.
Yet this risks selling such measures short. While they lack the force of law, both concurrent resolutions and vetoed joint resolutions still serve as clear and compelling evidence of congressional opposition to military action. The executive branch’s own legal arguments acknowledge that the president’s authority to use military force should be diminished in the face of such opposition, even where not expressed in a statute. Some federal courts have also suggested that such expressions of disagreement may make them more willing to adjudicate war powers disputes, which they generally avoid. In this sense, while concurrent resolutions and vetoed joint resolutions lack the force of law, they may still have legal effects.
Recognizing their legal ramifications may sharpen the incentives that members of Congress have to pursue (or oppose) such resolutions. Importantly, it also points to some new strategies Congress might use to amplify these effects, if it were so inclined.
Putting the Resolutions in Procedural Context
The two resolutions at issue—the joint resolution S.J.Res. 185 in the Senate and the concurrent resolution H.Con.Res. 86 in the House—are the latest in a series of similar measures that each chamber has considered since the United States began military operations against Iran on Feb. 28. Seven prior joint resolutions in the Senate and two prior concurrent resolutions in the House have failed on narrow, mostly party-line votes. But the growing unpopularity of the war, the Trump administration’s decision to continue military operations past the 60-day deadline set by the War Powers Resolution, and the recent success of several Trump-backed challengers to incumbent Republican legislators have all led a handful of (mostly Republican) legislators to shift positions, narrowly giving both measures majority support.
The two measures have similar but not quite identical operative language. H.Con.Res. 86 “directs the President to remove [U.S. armed forces] from hostilities against the Islamic Republic of Iran,” but exempts “those elements … that may be necessary to defend the United States or an ally or partner of the United States from imminent attack” so long as the latter is pursued consistent with the War Powers Resolution’s 60-day cutoff where not authorized by Congress. The House resolution is slightly more permissive than S.J.Res. 185, which begins with a series of “findings” before plainly “direct[ing] the President to remove [U.S. armed forces] from hostilities within or against Iran” except where authorized by Congress. But it then caveats the latter with a “rule of construction” clarifying that this directive should not be construed to prevent the United States from defending itself or its overseas facilities and personnel from attack, from “collecting, analyzing, or sharing intelligence” on Iran, nor from assisting partner countries and other nations attacked by Iran by “intercepting retaliatory attacks by Iran or its proxies” or providing them “defensive materiel support for such defensive measures.”
Of course, while majority support in both chambers is the constitutional threshold for congressional action, it often isn’t enough to pass legislation under the ordinary rules the House and Senate have set up for themselves. So long as the Speaker of the House can keep their party in line—something that the current Speaker Mike Johnson has occasionally found difficult in today’s Congress—he or she can effectively set the legislative agenda for the House and block disfavored measures, even if those measures would likely receive majority support if brought up for a vote. Meanwhile, in the Senate, the filibuster generally allows a single senator to stop any debatable motion or legislation from proceeding unless 60 other senators vote in support of cloture, allowing the measure to proceed.
The War Powers Resolution, however, installed expedited procedures that allow legislators to bypass some of these barriers and enact certain types of measures on something closer to a simple majority. Importantly, while they appear in a statute, these expedited procedures are in fact exercises of the House’s and Senate’s respective exclusive constitutional authority to “determine the Rules of its Proceedings[,]” which cannot be constrained by statute. As a result, these rules can be superseded at any time by either chamber through their own rulemaking procedures, which they often exercise through simple resolutions enacted solely by that chamber. Regardless, they generally remain operative in both chambers and provide the baseline procedural rules for them as they consider qualifying concurrent and joint resolutions.
As originally enacted in 1973, section 5(c) of the War Powers Resolution directs that, “at any time that United States Armed Forces are engaged in hostilities outside [the United States] without a declaration of war or specific statutory authorization, such forces shall be removed by the President if the Congress so directs by concurrent resolution.” Section 7 of the War Powers Resolution (now codified at 50 U.S.C. § 1546) in turn provides expedited procedures for concurrent resolutions introduced pursuant to section 5(c) in both the House and Senate, requiring that they be reported out of committee with relevant recommendations within 15 days of introduction and then voted on within three days, “unless such House shall otherwise determine by yeas or nays.”
The same expedited procedures also apply when each chamber receives a concurrent resolution that has already been passed by the other chamber. And if the two chambers each pass different versions of a concurrent resolution, section 7 requires that “conferees … be promptly appointed” and requires them to file a report reconciling the two within six calendar days, at which point both chambers must act on the report in another six calendar days. If the conferees can’t agree within 48 hours, they must report back to their respective chambers.
Today, however, the validity of section 5(c) is under serious constitutional doubt. In its 1983 decision in INS v. Chadha, the Supreme Court invalidated a separate statutory scheme that similarly made certain legal effects contingent on subsequent action by Congress short of actual legislation. The Court held that imposing new statutory legal obligations “requires action in conformity with the express procedures of the Constitution’s prescription for legislative action: passage by a majority of both Houses and presentment to the President.” Though its constitutionality has never been the subject of litigation, section 5(c) is vulnerable to a similar critique, as it makes a statutory obligation to withdraw contingent on Congress’s enactment of a concurrent resolution, a type of measure that does not require presentment to (and thus cannot be vetoed by) the president. Some scholars have suggested that the holding in Chadha may not reach as far as section 5(c). But the conventional wisdom is that section 5(c) is likely unconstitutional under Chadha as well.
This left a significant hole in the War Powers Resolution’s statutory scheme that some (but not all) in Congress soon sought to fill. In 1983, a compromise (now codified at 50 U.S.C. § 1546a) ended up importing a different set of expedited procedures from another law—specifically, section 601(b) of the 1976 International Security Assistance and Arms Export Control Act (AECA)—and adapting them to the War Powers Resolution context. Under these procedures, bills and joint resolutions “requir[ing] the removal of United States Armed Forces engaged in hostilities outside the [United States] without a declaration of war or specific statutory authorization” may be the subject of a privileged motion to discharge with limited time for debate in the Senate 10 days after being introduced, and may then be brought forward for consideration on the Senate floor by another nondebatable motion after that. This effectively bypasses the Senate filibuster and allows a simple majority to move a measure to the floor and potentially enact it with a simple majority vote. Section 1546a also expressly permits amendments, which the original AECA procedures did not. But these procedures apply only in the Senate, which was more interested in post-Chadha reforms; in the House, bills and joint resolutions directing withdrawal remain subject to regular order.
This helps explain why the debate over the Iran war has centered on concurrent resolutions in the House and joint resolutions in the Senate. The House focuses on concurrent resolutions because these are the only measures for which it has expedited procedures, something the sponsors of such measures need to be able to force votes over the objections of the House’s current Republican leadership. The Senate, meanwhile, focuses on joint resolutions because it, unlike the House, has expedited procedures for such measures. Moreover, joint resolutions would be more effective if enacted, as they do not raise Chadha concerns and have the force of law. This is no doubt why, where House leadership supports such measures, both the House and Senate have generally focused on enacting joint resolutions rather than concurrent resolutions.
Legal Effects Absent the Force of Law
Recent history underscores the extent to which debates over both types of resolutions can have a meaningful political effect. By forcing public votes on resolutions clearly opposed to the Trump administration’s policy toward Iran, legislators have been able to compel their colleagues to take public positions and build associated political pressure. As the war has become less popular and more legally questionable, this has helped persuade more legislators to openly oppose it. And while there may be limits on how far concurrent and joint resolutions are likely to advance, the coalition built during their debate may find other avenues to constrain the president’s power. During the first Trump administration, for example, a similar process built a bipartisan majority in both chambers that opposed U.S. involvement in the war in Yemen. This coalition never succeeded in overriding President Trump’s veto to enact a joint resolution. But it was able to insert statutory limits on certain activities into later annual defense legislation, which Trump ultimately had to accept in order to get the other authorities and funding he needed.
Less clear, however, is whether concurrent and vetoed joint resolutions themselves have any legal effects. A joint resolution passed by both chambers but vetoed by the president simply fails and is never enacted. A concurrent resolution, meanwhile, never has the force of law, even when fully enacted. Instead, they are generally used to exercise Congress’s various nonlegislative authorities, such as its ability to act or make statements as an institution. The House and Senate can also use concurrent resolutions to collectively exercise authorities they have individually, such as their exclusive constitutional authority to establish their own respective rules of procedure. That said, it’s more common for each chamber to do so on its own, through simple resolutions requiring only the approval of that chamber. Regardless, such measures do not (and cannot) have the force of law as a statute does.
But a measure does not need the force of law to have legal effects. Different legal frameworks hinge on various facts and considerations, some of which a political actor or institution may control in ways that are not legislative in nature. And examining the arguments that the executive branch has made in support of the president’s inherent authority to use military force without congressional authorization—the authority President Trump is relying on in Iran—suggests that one such factor may be congressional opposition of the sort that concurrent resolutions and vetoed joint resolutions demonstrate.
While it has made broader claims in the past, today’s executive branch—including in the second Trump administration—generally maintains that Article II of the Constitution gives the president broad inherent authority to use military force where he or she can reasonably determine that doing so will (a) “serve sufficiently important national interests” and (b) not result in military operations “sufficiently extensive in ‘nature, scope, and duration’ to constitute a ‘war’ requiring prior specific congressional approval under the Declaration of War Clause.” The latter threshold is deliberately left fact specific and poorly defined, but is generally understood to mean “prolonged and substantial military engagements, typically involving exposure of U.S. military personnel to significant risk over a substantial period.” The executive branch concedes that this authority only exists “at least insofar as Congress has not specifically restricted it,” nodding toward the possibility that Congress may be able to impose some statutory restrictions. But it has also sometimes suggested that even these limitations may not apply in certain circumstances, such as where the president is acting in national self-defense.
Importantly, the executive branch does not derive this broad vision of presidential authority from just “the express assignment of powers and responsibilities to the President and Congress in the Constitution,” which, it concedes, “divides authority over the military between the President and Congress.” Instead, it leans heavily into what it calls “the ‘historical gloss’ placed on the Constitution by two centuries of practice[.]” A term taken from Justice Felix Frankfurter’s concurrence in the canonical 1952 case Youngstown Sheet & Tube Co. v. Sawyer, this use of “historical gloss” is intended to invoke Frankfurter’s proposition that “a systematic, unbroken, executive practice, long pursued to the knowledge of the Congress and never before questioned …, making as it were such exercise of power part of the structure of our government, may be treated as a gloss on ‘executive Power’ vested in the President by [the Constitution].”
Specifically, the executive branch argues that U.S history is “replete with instances of presidential uses of military force abroad in the absence of prior congressional approval” that met with little meaningful congressional pushback. In its view, this reflects a “practical understanding” between the political branches regarding “their respective roles and responsibilities with respect to national defense[,]” one wherein Congress has effectively acquiesced to the executive branch’s assertion of broad inherent presidential authority, making it part of the president’s inherent constitutional authority.
Scholars have raised serious questions about both this historical account and how the executive branch evaluates congressional acquiescence. But even if one takes the executive branch’s argument on its own terms, clear expressions of congressional opposition—such as concurrent resolutions and vetoed joint resolutions directing the withdrawal of U.S. armed forces from hostilities—can undermine these claims of congressional acquiescence. A concurrent resolution lacks the force of law and thus can’t impose new statutory restrictions, but it undoubtedly expresses the considered views of Congress. And while a vetoed joint resolution technically remains unadopted, it generates legislative history (including recorded votes) that strongly suggests opposition by a majority of legislators in both chambers.
Frankfurter’s analysis suggests that he would have seen both as relevant to patterns of acquiescence. Indeed, his own Youngstown concurrence—in which he rejected a wartime claim of authority by President Truman—focuses almost entirely on similar legislative history. “It would be not merely infelicitous draftsmanship but almost offensive gaucherie,” he wrote, “to write [an express] restriction upon the President’s power in terms into a statute rather than to have it authoritatively expounded, as it was, by controlling legislative history.” In his view, Congress did not have to express opposition solely through statutes to undermine claims of acquiescence.
Contrary congressional views also weigh heavily in another legal framework from Youngstown that the Supreme Court often applies—and the executive branch has frequently invoked—in related contexts. In his own concurrence, Justice Robert Jackson famously posited that “Presidential powers are not fixed but fluctuate, depending upon their disjunction or conjunction with those of Congress.” He then went on to articulate an influential tripartite framework for evaluating presidential claims of authority, stating:
- When the President acts pursuant to an express or implied authorization of Congress, his authority is at its maximum….
- When the President acts in absence of either a congressional grant or denial of authority … there is a zone of twilight in which he and Congress may have concurrent authority, or in which its distribution is uncertain. Therefore, congressional inertia, indifference or quiescence may sometimes, at least as a practical matter, enable, if not invite, measures on independent presidential responsibility….
- When the President takes measures incompatible with the expressed or implied will of Congress, his power is at its lowest ebb … Presidential claim to a power at once so conclusive and preclusive must be scrutinized with caution….
Like Frankfurter, Jackson—who also ruled against the Truman administration—did not limit his assessment to statutory enactments. Instead, his focus on the “indifference or quiescence” and “implied will” of Congress underscores his understanding that other factors could demonstrate congressional opposition, which could in turn constrain the president’s authority to exercise in the “zone of twilight” or perhaps even push the president’s authority to its lowest ebb. To Jackson, concurrent resolutions and vetoed joint resolutions would seem as relevant to any such assessment as the resolutions would to Frankfurter’s search for acquiescence. Jackson’s opinion even incorporated Frankfurter’s account of the “analysis, history, and application” of the key statute at issue by reference, along with that of another justice.
The Roberts era of the Supreme Court has continued to apply both Frankfurter’s historical gloss and Jackson’s tripartite framework. And as it’s done so, it’s continued to incorporate a broad range of congressional activity into its assessments of congressional will and acquiescence. For example, in weighing whether historical practice had placed a historical gloss on recess appointments in National Labor Relations Board v. Noel Canning, the Court looked to simple resolutions, committee reports, floor debates, and legislative history to evaluate Congress’s constitutional understanding and degree of acquiescence. It did much the same when applying Jackson’s tripartite framework to the recognition power in Zivotofsky v. Kerry.
If anything, concurrent resolutions and vetoed joint resolutions are more compelling evidence of congressional sentiment than many of these other sources, as they are clear statements voted on and approved by a majority in both chambers of Congress. The executive branch seems to agree, as it’s repeatedly cited both simple resolutions and concurrent resolutions—as well as other measures that are similarly bicameral but lack the force of law, like sense of Congress provisions in statutes—as evidence of congressional acquiescence to the president’s use of military force where they align with the president’s actions. Presumably, the same logic should hold when these sorts of measures oppose the president’s actions as well.
There is another important legal context where federal courts have suggested that expressions of congressional opposition without the force of law may carry weight: in determining justiciability. In recent decades, federal courts have often resisted reaching the merits of war powers-related disputes, generally on the grounds that such disputes raise ripeness or political question doctrine issues that make them not subject to judicial resolution. Several of these courts, however, have suggested that disputes would be justiciable if there were signs of a “constitutional impasse” between the political branches. And a commonly cited indicator of such an impasse is the expression of a contrary view by Congress through a resolution or similar measure, even where it lacks the force of law. Indeed, in the controlling Goldwater v. Carter concurrence that first articulated the need for a “constitutional impasse” to overcome justiciability barriers in certain cases, Justice Lewis Powell’s analysis hinged on the Senate’s failure to enact a simple resolution objecting to the president’s actions.
In this sense, there should be little doubt that concurrent resolutions and vetoed joint resolutions have legal effects, even if they do not carry the force of law. As clear and unambiguous expressions of congressional opposition to the executive branch’s argument, they bear not only on two of the most important legal arguments the executive branch has leaned on to justify its use of military force but also on the willingness of federal courts to review those arguments.
Acknowledging this, in turn, points to one way Congress may be able to amplify these legal effects. As discussed above, both the House and Senate have generally preferred joint resolutions over concurrent resolutions, even where the former seem certain to end in a presidential veto and a failed override. Indeed, while they have enacted two different joint resolutions under the section 1546a procedures added to the War Powers Resolution in 1983, the House and Senate have never both enacted a concurrent resolution pursuant to section 7 procedures.
But if one accepts that the main legal significance of these measures is in communicating congressional opposition, this may be a mistake. Precisely because a concurrent resolution represents the finalized, bicamerally enacted views of Congress, certain audiences may view it as a more credible indicator of such opposition than a vetoed joint resolution, which remains unenacted if efforts to override the veto fail. Federal courts in particular may be inclined to this view, as contemporary judges tend to be far more skeptical of legislative history and more focused on the specific enactments of Congress than Frankfurter and Jackson were. For this reason, Congress may be well advised not to focus too narrowly on joint resolutions and to expand its efforts to concurrent resolutions as well, at least so long as the odds of overcoming a presidential veto remain perishingly slim.
At a minimum, a measure approved by both chambers—whether a concurrent resolution or a vetoed joint resolution—will be more persuasive than if each chamber acts and votes individually on similarly framed but different measures. For this reason, the supporters of H.Con.Res. 86 and S.J.Res. 185 have a strong incentive to keep pushing one or both measures through both chambers. Doing so, however, may soon enter unknown territory.
The Road Ahead, and Potential New Turns
Despite the significance of recent votes, neither H.Con.Res. 86 nor S.J.Res. 185 are anywhere close to the end of the road. While the House has passed the former, it has arrived only recently in the Senate, where it faces a novel and somewhat uncertain route forward. The latter, meanwhile, has not even been approved by the Senate, let alone Congress as a whole. Looking ahead to the procedural road ahead for both resolutions helps frame their likely legal and political impact. It also highlights certain novel directions Congress may choose to take them in.
S.J.Res. 185 has a fairly well-established path ahead. Under the section 1546a procedures applicable to joint resolutions, a motion to proceed to consideration in the Senate is now privileged, meaning it can be brought up for a vote by any member and will only be subject to a fixed period of debate, preventing a filibuster and enabling a simple majority to pass it. The Senate would then proceed to consider amendments, which section 1546a expressly provides for.
In debating another joint resolution in 2018, the Senate voted 96-3 that any such amendments would have to be germane for consideration, meaning that they must relate to the same subject matter. While section 1546a limits the time for debate on a given joint resolution (blocking the use of the filibuster), it does not necessarily constrain the consideration of amendments, all of which will need to be voted on before the House finally votes on the joint resolution as amended. In practice, however, senators wishing to proceed to consideration on a joint resolution like S.J.Res. 185 have usually leveraged their ability to use these expedited procedures to negotiate a more structured consideration process with the Senate leadership, which the Senate then adopts through unanimous consent. These alternate rules supersede the expedited procedures spelled out in section 1546a and usually allow for fixed periods of debate on a limited number of amendments.
If and when the joint resolution passes the Senate, it will most likely be referred to the House Committee on Foreign Affairs. There, however, the section 1546a procedures end; instead, the joint resolution will be subject to regular order. This generally means that the committee chairman, rules committee, and Speaker all need to agree to move the measures forward for consideration—something that may prove difficult for S.J.Res. 185, given Republican control. If S.J.Res. 185 is still in committee after 30 days, its supporters can try to move it to the floor through a discharge petition. Or they may use the same to try to move a resolution establishing a special rule out of the rules committee that sets structured terms for debating S.J.Res. 185. Doing either, however, will require the support of 218 members—three more than voted for H.Con.Res. 86 last week. In this sense, it may prove to be a heavy lift.
For this reason, opponents of the war in Iran may instead focus their efforts on H.Con.Res. 86, which—having passed the House—has now been referred to the Senate Committee on Foreign Relations. Unlike with joint resolutions, the expedited procedures for concurrent resolutions set out in section 7 of the War Powers Resolution apply in both chambers and should, in theory, provide for its expedited consideration in the Senate as well. Actual practice, however, may prove more complicated.
As the Congressional Research Service (CRS) has ably documented, Congress has never previously adopted a concurrent resolution through the expedited procedures provided by section 7. The House of Representatives has approved three concurrent resolutions directing the withdrawal of U.S. armed forces from hostilities pursuant to section 5(c): H.Con.Res. 170 in 1993 relating to Somalia, H.Con.Res. 105 in 2014 relating to Iraq, and H.Con.Res. 83 in 2020 relating to Iran. The resolutions were sent to the Senate Foreign Relations Committee for consideration, but none were discharged from committee after 15 days as section 7 requires. According to the CRS, this is apparently because Congress enacted a limited statutory authorization the next day in one case and because the resolutions in question used verbs other than “remove” as used in section 5(c), in the other two cases. The leadership of the Senate Foreign Relations Committee appears to have seen both factors as disqualifying the concurrent resolutions from eligibility for section 7 procedures, though the ranking member notably objected on the floor in one of the latter cases.
H.Con.Res. 86 more or less parrots the language of section 5(c), “direct[ing] the President to remove United States Armed Forces from hostilities against the Islamic Republic of Iran, other than those elements … necessary to defend the United States or an ally or partner … from imminent attack….” Hence, there are no clear grounds for the Senate to treat it as not qualifying for the section 7 expedited procedures. But unlike the section 1546a procedures, section 7 does not make a motion to proceed to consideration automatically in order and privileged when the specified time period for committee consideration elapses, meaning that a legislator cannot simply motion to do so with confidence they will be recognized and the motion will pass on a simple majority. Instead, section 1546a simply states in the passive voice that a qualifying concurrent resolution “shall be reported out by such committee together with its recommendations within fifteen calendar days” and that, at that point, the concurrent resolution becomes “the pending business of the [Senate].”
What would happen if the committee declined to move H.Con.Res. 86 forward is not entirely clear. The Senate has interpreted other similar expedited procedures in the War Powers Resolution as automatically discharging qualifying measures under such circumstances, but it has never addressed section 7 specifically. As there would be no pending question before the Senate, there would be nothing to challenge through a point of order. And while senators could still motion to proceed to consideration, it’s not clear that such a motion would be privileged, making it potentially subject to a filibuster. Such a move by the committee leadership would be lawless obstruction and undermine the congressional intent behind section 7: namely, to move qualifying concurrent resolutions forward on a fixed schedule with a majority basis. But it’s not clear what the remedy would be. As the CRS has noted, this uncertainty is partially why more contemporary expedited procedures have moved away from passive language like that used in section 7 and toward procedures like those in section 1546a that create clear enforcement mechanisms.
Meanwhile, if H.Con.Res. 86 does proceed to consideration, then that raises another set of questions. Concurrent resolutions are normally subject to amendment in both the House and Senate. And as section 7 makes no mention of amendments one way or the other, it likely does not supersede this usual practice. Unlike in the House, amendments in the Senate also do not normally need to be germane, meaning the amendments could be used in theory to accomplish a wide range of measures potentially unrelated to the war in Iran. That said, given the substantial bipartisan margins by which the Senate adopted the current germaneness requirement for section 1546a procedures in 2018, one should perhaps expect a similar effort for section 7’s expedited procedures.
Even germane amendments, however, could have a bearing on what H.Con.Res. 86 accomplishes. What the Senate considers germane and not germane is not entirely clear, in part because (unlike the House) most of its recent relevant precedents are not publicly available. That said, as both section 7 and section 1546a procedures cover resolutions implementing section 5(c) of the War Powers Resolution, their substantive scope for germaneness and related purposes should be similar. Hence, examining the legislative history of the two Yemen-related joint resolutions that were debated after the adoption of the germaneness requirement for section 1546a—S.J.Res. 54 in 2018 and S.J.Res. 7 in 2019—may give some hints as to how the same issues may play out for H.Con.Res. 86.
During the debates on those joint resolutions, Congress ultimately considered several (presumably germane) amendments that implement certain changes, including imposing additional statutory reporting obligations (something that concurrent resolutions can’t do as they lack the force of law); setting rules regarding how the joint resolution should be interpreted; amending the scope of military activities being affected; and expressly stating how “hostilities” should be interpreted for the purposes of the joint resolution. S.J.Res. 54 also contained a number of preambles making observations relating to the Yemen conflict, while S.J.Res. 7 included a lengthy section articulating congressional “Findings” regarding the same. This past practice suggests that the Senate may well treat similar measures in relation to H.Con.Res. 86 as germane. Moreover, the House has adopted concurrent resolutions through section 7 procedures that contain similar terms and provisions, which should aid them in surviving subsequent efforts to reconcile the House and Senate versions.
This is notable, as there are ways Congress could use such provisions to increase the legal effects a concurrent resolution might have. For example, a preamble or findings section might make clear Congress’s view that the Trump administration’s ongoing military activities violate the War Powers Resolution’s 60-day cutoff or otherwise weigh in on how the War Powers Resolution should apply to the Iran war—a congressional perspective that some courts have suggested would weigh in on their interpretation of the statute, if a legal challenge were ever successfully brought. Or Congress could use the same provisions to more expressly state what military activities it opposes, with a level of detail and precision that the standard “removal” language in section 5(c) makes difficult. So long as these measures relate to the Iran war and align with the “removal” direction at the heart of the concurrent resolution, it seems unlikely that they would raise serious objections over germaneness.
If it feels more ambitious, Congress might also explore leaning into some of the nonlegislative legal authorities that it can bring to bear through concurrent resolutions. As the House and Senate define their own rules, they could amend the concurrent resolution to establish additional expedited procedures for considering future legislation to achieve its objective of removing U.S. armed forces from hostilities with Iran. For example, the concurrent resolution could establish expedited procedures for certain amendments to this coming year’s National Defense Authorization Act that would impose a statutory obligation to withdraw certain U.S. military forces from Iran, guaranteeing their inclusion on a clean majority vote in both chambers. Or one could similarly set up expedited procedures for adding an amendment to cut off funding for the war to forthcoming appropriations legislation.
Alternatively, the House and Senate could amend the concurrent resolution to authorize certain steps on behalf of Congress as an institution. For example, it could authorize litigation on behalf of Congress (or the House and Senate individually) challenging the legal basis for continued U.S. military operations in Iran—certainly on the basis of noncompliance with section 5(c) of the War Powers Resolution (teeing up the question of whether Chadha should be properly understood to have invalidated section 5(c)), but perhaps for violating the War Powers Resolution’s 60-day cutoff or Declare War Clause as well. This would be a novel step Congress has never taken before, though the House and Senate have individually. Yet the Supreme Court has suggested that Congress and its chambers may have standing to sue over institutional injuries where individual legislators do not, and lower courts have recently entertained similar actions. By presenting at least a credible threat of a viable legal challenge by Congress, such a step could dramatically amplify legal pressure on the Trump administration.
Of course, if the Senate does end up adopting a germaneness requirement for section 7 procedures, these more ambitious measures may well be seen as out of scope. But it’s not certain. In the House, at least, amendments that serve the same “fundamental purpose” as the legislation they are amending and that “see[k] to achieve the same purpose by another closely related method” are generally germane. And such amendments would aim to do precisely what Congress intended concurrent resolutions that pass through section 7 of the War Powers Resolution to accomplish, in closely related ways (that is, a statutory directive and related judicial enforcement): to compel the executive branch to remove U.S. armed forces from hostilities that Congress has not been authorized.
Regardless, given the narrow margins by which S.J.Res. 185 has moved forward in the Senate thus far, it’s not clear that H.Con.Res. 86 will have the political support necessary to move forward as is, let alone in a more substantially amended form. But as the war in Iran and its attendant costs become more dire, sentiments in Congress may shift further, opening up new opportunities for novel responses—especially if the Iran war extends past this year’s election and control of one or both chambers in the new incoming Congress shifts away from the president’s allies.
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Congress’s options for constraining the president from using military force may be limited, but they are not a null set. Even in the face of a presidential veto, Congress can use concurrent resolutions and vetoed joint resolutions to make its opposition to the Trump administration’s actions in Iran abundantly clear. This doesn’t have the same effect as a statutory restriction, but it does undermine the executive branch’s argument as to why the president has such authority in the first place. By alleviating justiciability barriers, it may also make it more likely that such arguments will finally be subjected to judicial scrutiny. And there is even more that Congress might be able to do with concurrent resolutions, depending on how
How significant an effect this will have is unclear, in large part because Congress has never taken any of these steps before. But the Trump administration’s willingness to push the president’s inherent constitutional authority to the hilt in striking Iran may well warrant a similarly unprecedented response by Congress. Such moments have put the War Powers Resolution in new light before, turning once-moribund provisions into new tools for attempting to constrain the president. As Congress enters new territory over the next several weeks, the same may yet happen again.
