President Obama and GOP presidential nominee Mitt Romney walk away after they greet each other at the end of the third presidential debate in Boca Raton, Fla., on Monday. Saul Loeb/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

itoggle caption Rick Wilking/Pool/Getty Images