
President Barack Obama, right, and the British prime minister, David Cameron, presented a united front about Iran in their White House press conference on Friday. Photograph: Alex Wong/Getty Images
Barack Obama and David Cameron have warned of possible military confrontation with Iran if Congress succeeds in passing new sanctions legislation rather than giving nuclear non-proliferation talks more time.
In a joint press conference characterised by unusually blunt pressure on US lawmakers, the president said he would veto their proposed legislation if it reached his desk. The British prime minister revealed he was making personal calls to senators during his visit to Washington to dissuade them from passing the bill in the first place.