Supporters of Republican presidential candidate Mitt Romney wait for... Photo d'actualitéAmérique du Nord,Attendre,Barack Obama,Boston - Massachusetts,Candidat aux élections présidentielles,Continent américain,Discours,Démocratie,Exposition et salon professionnel,Gouvernement,Horizontal,Massachusetts,Matin,Mitt Romney,Média,Nord,Politique,Président,Président des États-Unis,Suivre,Voter,Élection,Élection présidentielle,Élections présidentielles des États-Unis,Élections présidentielles des États-Unis de 2012,États-UnisPhotographer Collection: Bloomberg 2012 BloombergSupporters of Republican presidential candidate Mitt Romney wait for Romney to make his concession speech following the news that U.S. President Barack Obama has won re-election, at the Boston Convention and Exhibition Center in Boston, Massachusetts, U.S., in the early morning on Wednesday, Nov. 7, 2012. Obama, the post-partisan candidate of hope who became the first black U.S. president, won re-election today by overcoming four years of economic discontent with a mix of political populism and electoral math. Photographer: Andrew Harrer/Bloomberg via Getty Images