President Barack Obama and first lady Michelle Obama acknowledge the crowd at his final campaign stop on the evening before the 2012 election, Monday, Nov. 5, 2012, in the downtown Des Moines, Iowa. (AP Photo/Carolyn Kaster)

Associated Press
President Barack Obama and first lady Michelle Obama acknowledge the crowd at his final campaign stop on the evening before the 2012 election, Monday, Nov. 5, 2012, in the downtown Des Moines, Iowa. (AP Photo/Carolyn Kaster)
President Barack Obama and first lady Michelle Obama acknowledge the crowd at his final campaign stop on the evening before the 2012 election, Monday, Nov. 5, 2012, in the downtown Des Moines, Iowa. (AP Photo/Carolyn Kaster)
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