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This Image was created using Instagram: US President Barack Obama speaks on stage during day three of the Democratic National Convention at Time Warner Cable Arena on September 6, 2012 in Charlotte, North Carolina. Justin Sullivan/Getty Images
Books and campaign buttons in support of President Barack Obama for sale during day three of the Democratic National Convention. Chip Somodevilla/Getty Images
President Barack Obama addresses a rally during the last day of campaigning in the general election on November 5, 2012 in Madison, Wisconsin. BOTTOM: A row of plastic folding chairs are marked with signs reading "WH Staff" next to the stage where President Barack Obama will speak during a campaign rally November 5, 2012 in Madison, Wisconsin. Chip Somodevilla/Getty Images
Republican presidential candidate, former Massachusetts Gov. Mitt Romney (C), boards the campaign plane on 1 September, 2012 in Cincinnati, Ohio. Justin Sullivan/Getty Images
Ann Romney, wife of Republican presidential candidate, former Massachusetts Gov. Mitt Romney, hands over homemade Welsh Cakes to members of the travelling press aboard the campaign plane on 1 September, 2012 in Cincinnati, Ohio. Justin Sullivan/Getty Images
Republican presidential candidate, former Massachusetts Gov Mitt Romney greets supporters during a campaign rally on 25 October, 2012 in Cincinnati, Ohio. Justin Sullivan/Getty Images