Exit poll: Hint of economic optimism boosted Obama

People vote at Washington Square Mall in Evansville, Ind. on Tuesday, Nov. 6, 2012.  (AP Photo/The Evansville Courier & Press, Molly Bartels) Photo by
People vote at Washington Square Mall in Evansville, Ind. on Tuesday, Nov. 6, 2012. (AP Photo/The Evansville Courier & Press, Molly Bartels) Photo by
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