Freshman Republican Senator Tom Cotton tells CBS News he stands behind his letter to Iran, saying it is critical to stopping them from getting a nuclear weapon. Rough Cut (No Reporter Narration)
ROUGH CUT (NO REPORTER NARRATION) STORY: Freshman Republican Senator Tom Cotton on Sunday (March 15) stood by the letter he wrote to the government of Iran and convinced 46 of his colleagues to sign. Cotton told CBS's "Face the Nation" that he believes the letter makes clear to Iran how the U.S. political system works. Cotton disparaged remarks by Secretary of State John Kerry earlier in the program that Congress cannot change an executive agreement, saying the Secretary had admitted before Congress earlier in the week no deal would be legally binding. The senator also said the response of Iran's foreign minister, Mohammad Javad Zarif -- who is leading negotiations with Kerry in Switzerland -- shows that Iran does not understand how the U.S. system works. Zarif's response said reneging on a deal would violate international law, while Cotton maintains international law cannot overrule the U.S. Constitution.