As U.S. and Iranian negotiators try to hammer out the final details of a nuclear deal, the White House is at loggerheads with some Republican lawmakers who are bent on derailing the deal. U.S. Secretary of State John Kerry and Iran’s Foreign Minister Mohammad Javad Zarif met Monday on the sidelines of a United Nations conference on nuclear non-proliferation, sitting down at the Iranian UN Ambassador’s New York home. After the meeting, Kerry said the two sides were closer than ever to a historic agreement, saying the “entire world will be safer” if a deal can be struck, but added that the work is far from complete and “key issues remain unresolved.”