Foreign Relations & International Law

Lawfare Daily: The End of New START? With John Drennan and Matthew Sharp

Ariane Tabatabai, John Drennan, Matthew Sharp, Jen Patja
Thursday, December 4, 2025, 7:00 AM
What would the end of New START mean for U.S.-Russia relations?

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New START, the last bilateral nuclear arms control treaty between the United States and Russia, will expire in February 2026 if Washington and Moscow do not reach an understanding on its extension—as they have signaled they are interested to do. What would the end of New START mean for U.S.-Russia relations and the arms control architecture that had for decades contributed to stability among great powers?

Lawfare Public Service Fellow Ariane Tabatabai sits down with John Drennan, Robert A. Belfer International Affairs Fellow in European Security, at the Council on Foreign Relations, and Matthew Sharp, Fellow at MIT’s Center for Nuclear Security Policy, to discuss what New START is, the implications of its expiration, and where the arms control regime might go from here.

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Dr. Ariane Tabatabai is a Public Service Fellow at Lawfare. Previously, she served in a number of roles in the U.S. Departments of State and Defense, including most recently as the Deputy Assistant Secretary of Defense for Force Education and Training. She is the author of No Conquest, No Defeat and the co-author of Triple Axis, as well as a number of peer-reviewed articles.
John Drennan is the Robert A. Belfer International Affairs Fellow in European Security at the Council on Foreign Relations.
Matthew Sharp is a fellow at MIT’s Center for Nuclear Security Policy.
Jen Patja is the editor of the Lawfare Podcast and Rational Security, and serves as Lawfare’s Director of Audience Engagement. Previously, she was Co-Executive Director of Virginia Civics and Deputy Director of the Center for the Constitution at James Madison's Montpelier, where she worked to deepen public understanding of constitutional democracy and inspire meaningful civic participation.
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