Romney stumps in Wisconsin

Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets supporters at a campaign in Wisconsin.

Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets supporters at a campaign stop at the Wisconsin Products Pavilion at State Fair Park in West Allis, Wis., Friday, Nov. 2, 2012. (AP Photo/Charles Dharapak)

Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets supporters at a campaign stop at the Wisconsin Products Pavilion at State Fair Park in West Allis, Wis., Friday, Nov. 2, 2012. (AP Photo/Charles Dharapak)

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