Republican presidential candidate former Massachusetts Gov. Mitt Romney smiles as he arrives for a town hall meeting Wednesday, Sept. 14, 2011, in Sun Lakes, Ariz. (AP Photo/Ross D. Franklin)

Associated Press
Republican presidential candidate former Massachusetts Gov. Mitt Romney smiles as he arrives for a town hall meeting Wednesday, Sept. 14, 2011, in Sun Lakes, Ariz. (AP Photo/Ross D. Franklin)
Republican presidential candidate former Massachusetts Gov. Mitt Romney smiles as he arrives for a town hall meeting Wednesday, Sept. 14, 2011, in Sun Lakes, Ariz. (AP Photo/Ross D. Franklin)
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