US Democratic presidential nominee Senator Barack Obama (D-IL) and his wife Michelle vote in the US presidential election at the Beulah Shoesmith Elementary School in Chicago, Nov. 4, 2008.[Xinhua/Reuters Photo]
US Republican presidential nominee Senator John McCain casts his vote alongside his wife Cindy (L), at his polling place in Phoenix, Nov. 4, 2008. [Xinhua/Reuters Photo]
