President Obama and Republican presidential candidate Mitt Romney the last time they got together, at their Oct. 22 presidential debate in Boca Raton, Fla. Saul Loeb /AFP/Getty Images hide caption

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Before the vote, GOP nominee Mitt Romney and his running mate (Rep. Paul Ryan, in the background) were guarded by watchful Secret Service agents. After results came in, the agents quickly disappeared. Justin Sullivan/Getty Images hide caption

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Some of the faces of those who supported the president, at his victory rally Tuesday in Chicago. Jewel Samad /AFP/Getty Images hide caption

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President Obama celebrating early this morning in Chicago. Robyn Beck /AFP/Getty Images hide caption

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The Two-Way

Tell Us: Why Did Obama Win?

There are a number of possible reasons. Did the president run a better campaign? Is the economy really on the mend? Or is it as simple as him being more likable?

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In Columbus, Ohio, on Sunday, folks lined up to cast early ballots. Brendan Smialowski/AFP/Getty Images hide caption

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Early voters waited in line Wednesday in Miami. Joe Raedle/Getty Images hide caption

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Watch the wash or watch the debate? This woman was at a laundromat in Manhattan during Monday's debate. Timothy A. Clary /AFP/Getty Images hide caption

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President Obama and former Massachusetts Gov. Mitt Romney at tonight's debate in Boca Raton, Fla. Rick Wilking/Pool/Getty Images hide caption

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Republican presidential nominee Mitt Romney (left) and President Obama at the 67th Al Smith Dinner in New York City Thursday night. Brendan Smialowski /AFP/Getty Images hide caption

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Republican presidential candidate Sen. John McCain (left) and Democratic presidential candidate Barack Obama at the Alfred E. Smith Memorial Foundation Dinner on Oct. 16, 2008. At center is Bishop Edward Michael Cardinal Egan. Jim Watson /AFP/Getty Images hide caption

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Dan Senor, a senior adviser to Republican presidential candidate Mitt Romney. Jason Reed /Reuters /Landov hide caption

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