State Dept.: Sanctions will help U.S. get more out of Iran

American allies, and even Defense Secretary James Mattis, suggested President Trump not pull the U.S. out of the Iran nuclear agreement. Why didn’t he heed their urging? “We all agree on” the problems of Iran, says Deputy Assistant Secretary of State Andrew Peek, “We just occasionally don't see eye to eye on the way forward.” Peek joins William Brangham to discuss the administration’s goals.