Sen. Lindsey Graham (R-SC) talks to the media March 10 about the GOP letter sent to Iran, outside the U.S. Capitol in Washington, D.C.

Sen. Lindsey Graham (R-SC) talks to the media March 10 about the GOP letter sent to Iran, outside the U.S. Capitol in Washington, D.C.

This week, 47 Republican senators issued a warning to leaders of Iran: Any nuclear deal you make with President Barack Obama will not be considered binding and could be undone by the next administration. The move has shocked many in Washington, including Democrats who call it an unprecedented attempt by members of Congress to insert themselves into foreign policy negotiations—and to undermine the president. But some Republicans insist this is an understandable reaction to Obama’s pattern of overstepping his authority with Congress. Could the move derail negotiations with Iran? And does it challenge presidential power itself? We look at the fallout from the Republican letter to Iran.


  • John Bellinger partner with Arnold & Porter; Adjunct Senior Fellow in International Law at the Council on Foreign Relations. Former legal adviser for the National Security Council and the Department of State during the George W. Bush administration.
  • Juana Summers congressional reporter for NPR
  • David Rothkopf CEO and editor of the FP group, which publishes Foreign Policy Magazine; author of "Superclass" and "Power, Inc."; president and CEO of the international advisory firm Garten Rothkopf; visiting scholar at the Carnegie Endowment for International Peace; former U.S. Deputy Undersecretary of Commerce for International Trade Policy.
  • Byron York chief political correspondent, The Washington Examiner and author of "The Vast Left Wing Conspiracy: The Untold Story of the Democrats' Desperate Fight to Reclaim Power."

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