President Barack Obama waves to supporters as he is introduced at a 

President Barack Obama waves to supporters as he is introduced at a campaign event at the University of Colorado - Boulder, Thursday, Nov. 1, 2012, in Boulder Colo. (AP Photo/Pablo Martinez Monsivais)
Associated Press
President Barack Obama waves to supporters as he is introduced at a campaign event at the University of Colorado - Boulder, Thursday, Nov. 1, 2012, in Boulder Colo. (AP Photo/Pablo Martinez Monsivais)
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