Barack Obama secured re-election by maintaining the coalition that gave him victory four years ago: black and Hispanic voters, young Americans, women and Americans with post-graduate degrees. These outnumbered Mitt Romney’s supporters among white men, older Americans and people who have not been to college. This emerges clearly from analysis of YouGov’s major survey of 36,000 Americans during the final week of the campaign. This showed Obama leading Romney by 51-49% among Americans who supported one or other of the two men. It will take some days, and possibly weeks, for the count to be completed; however, it looks as if the final tally will produce figures within 0.5% of these.