Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks into a fundraising event on Thursday, Aug. 23, 2012 in Minnetonka Beach, Minn. (AP Photo/Evan Vucci)

Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks into a fundraising event on Thursday, Aug. 23, 2012 in Minnetonka Beach, Minn. (AP Photo/Evan Vucci)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks into a fundraising event on Thursday, Aug. 23, 2012 in Minnetonka Beach, Minn. (AP Photo/Evan Vucci)
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