Obama warns U.S. Congress against more sanctions on Iran

By Jeff Mason and Roberta Rampton WASHINGTON (Reuters) - U.S. President Barack Obama warned U.S. lawmakers on Friday not to trigger new sanctions against Iran over its nuclear programme, saying such a move would upset diplomatic talks and increase the likelihood of a military conflict with Tehran. In a joint news conference at the White House, Obama and British Prime Minister David Cameron urged members of Congress to be patient and hold off on any legislation calling for further sanctions now.