U.S. President Barack Obama speaks at the National League of Cities annual Congressional City Conference in Washington on March 9, 2015.
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March 13, 2015 10:33 AM EDT

President Obama said he’s “embarrassed” for the 47 Republican Senators who sent a letter to Iranian leaders earlier this week making a case against a pending deal on nuclear weapons.

“For them to address a letter to the Ayatollah, who they claim is our mortal enemy, “ Obama says in a trailer for an interview with Vice News. “And their basic argument to them is ‘Don’t deal with our president cause you can’t trust him to follow through on an agreement.’ That’s close to unprecedented.”

The President’s statements are among the many that have come out in the wake of the letter organized by freshman Sen. Tom Cotton of Arkansas. Iranian Foreign Minister Javad Zarif called it a “propaganda ploy.” Vice President Joe Biden returned fire with a scathing letter to Congress released late Monday, saying in part “the decision to undercut our President and circumvent our constitutional system offends me as a matter of principle.”

Seven Republican Senators did not sign the letter: Sens. Bob Corker and Lamar Alexander of Tennessee, Susan Collins of Maine, Jeff Flake of Arizona, Dan Coats of Indiana, Lisa Murkowski of Alaska, and Thad Cochran of Mississippi.

The President sat down with Shane Smith, the founder of Vice News on Tuesday while in Atlanta for an event with the Democratic National Committee and a speech at Georgia Institute of Technology. The wide-ranging interview will be released in full next Monday, but a trailer for the conversation was released Friday morning.

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