White House warns Republican Senators legislation could hurt Iran talks

The White House warned Republican Senators on Saturday that legislation requiring that Congress approve any deal reached with Iran over its nuclear capabilities could have a "profoundly negative impact" on negotiations. The warning in a letter from White House Chief of Staff Dennis McDonough, sent days before the due date for a framework of a deal that would limit Iran's nuclear capabilities, is the latest sign of rising tension between the White House and Republicans in Congress over the negoti