Article Photos: Iowa voters pick Obama in presidential election 13/20

  Kristi Atwood, from Kentucky, said her vote wouldn't matter in her home state so she came to do ground work going door to door for the Obama campaign on election day Tuesday Nov. 6, 2012 in Burlington, Iowa. After a grinding presidential campaign President Barack Obama and Republican presidential candidate, former Massachusetts Gov. Mitt Romney, yield center stage to American voters Tuesday for an Election Day choice that will frame the contours of government and the nation for years to come. (AP Photo/The Hawk Eye, John Gaines)