President Barack Obama looks over to a group of supporters after walking off stage at a campaign event at the University of Wisconsin-Madison, Thursday, Oct. 4, 2012, in Madison, Wis. (AP Photo/Pablo Martinez Monsivais)

Associated Press
President Barack Obama looks over to a group of supporters after walking off stage at a campaign event at the University of Wisconsin-Madison, Thursday, Oct. 4, 2012, in Madison, Wis. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama looks over to a group of supporters after walking off stage at a campaign event at the University of Wisconsin-Madison, Thursday, Oct. 4, 2012, in Madison, Wis. (AP Photo/Pablo Martinez Monsivais)
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