Iran Feeling The Heat From Trump On Nuclear Deal WASHINGTON, DC - OCTOBER 5: U.S. President Donald Trump speaks at a briefing with senior military leaders in the Cabinet Room of the White House October 5, 2017 in Washington, D.C. Mattis said this week that the U.S. and allies are 'holding the line' against the Taliban in Afghanistan as forecasts of a significant offensive by the militants remain unfulfilled. (Photo by Andrew Harrer-Pool/Getty Images) “Once the deal is decertified, and Congress appears to be on the brink of reapplying sanctions, that could change not only Iran’s calculus but also the European allies’ calculus,” said James Phillips, a Middle Eastern affairs expert at the Washington-based Heritage Foundation tank in an interview with  CNBC . The Trump Administration is raising the tempo on decertifying Iran over the nuclear deal, formally known as the Joint Comprehensive Plan of Action ( JCPOA ), envisaging a temporary relief of various sanctions ...