David Cameron may meet Mitt Romney in London During the French campaign, the Prime Minister refused a meeting with Francois Hollande, the winning socialist presidential candidate. Since then, Ed Miliband, the Labour leader, has aligned himself with the French leader and spoken of their "very warm" relationship. However, the Prime Minister could get round this rule with Mr Romney, as the American will not be formerly declared the Republican candidate until September. Gordon Brown also met three previous US presidential candidates - Mr Obama, Hillary Clinton and John McCain - in 2008 during the run-up to the last election. A meeting at this stage would go some way towards allaying any impression that the Prime Minister favours the current US President, Barack Obama. The Prime Minister and President went to a basketball game together and referred to each other in flattering tones at a grand White House dinner in March. Mr Cameron had described Obama as "someone with moral strength, with clear reason and with fundamental decency." The Prime Minister's spokesman said he could not comment on whether the two men would meet.