Time magazine called Lt. Gen. H.R. McMaster a “pre-eminent warrior-thinker.” President Trump called him a pain.

So when McMaster left the White House to be replaced by the hawkish John Bolton, foreign policy experts saw the writing on the wall. The Iran nuclear deal was next on the chopping block.

In this episode, we track how advisors clashed right up to the moment Trump yanked the United States out of the deal. Some wanted to push for a better deal. Others seemed intent on pressuring Iran until it breaks. Was Trump right to walk away? Or, was there something else -- something more political -- motivating the president’s decision?