** FILE ** This Nov. 23, 2103, file photo shows President Barack Obama speaking in the State Dining Room at the White House about the nuclear deal between six world powers and Iran that calls on Tehran to limit its nuclear activities in return for sanctions relief. (AP Photo/Susan Walsh, File)

Photo by: Susan Walsh

** FILE ** This Nov. 23, 2103, file photo shows President Barack Obama speaking in the State Dining Room at the White House about the nuclear deal between six world powers and Iran that calls on Tehran to limit its nuclear activities in return for sanctions relief. (AP Photo/Susan Walsh, File)