Dear President Biden:

Your administration’s talks with the P4+1 and Iran to reach a new nuclear agreement related to Iran's nuclear weapons program have reached a “political” inflection point, according to officials involved in the negotiations.

We write to call attention to a range of obligations that your administration is statutorily mandated to fulfill in relation to Congressional oversight over any such agreement, and to ensure that your officials know we are committed to providing availability, assistance, and resources so you can fully meet these mandates. We also write to emphasize that we are committed to using the full range of options and leverage available to United States Senators to ensure that you meet those obligations, and that the implementation of any agreement will be severely if not terminally hampered if you do not.

As a threshold matter, we reiterate our view that any agreement with Iran regarding its nuclear program is of such gravity for U.S. national security that by definition it is a treaty requiring Senate advice and consent.

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