Republican presidential candidate, former Massachusetts Gov. Mitt Romney steps on stage to speak at a campaign event at the Iowa Events Center Sunday, Nov. 4, 2012, in Des Moines, Iowa. (AP Photo/David Goldman)

Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney steps on stage to speak at a campaign event at the Iowa Events Center  Sunday, Nov. 4, 2012, in Des Moines, Iowa. (AP Photo/David Goldman)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney steps on stage to speak at a campaign event at the Iowa Events Center Sunday, Nov. 4, 2012, in Des Moines, Iowa. (AP Photo/David Goldman)
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