Mitt Romney

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Republican presidential candidate Mitt Romney boards his campaign plane in Santa Ana, Calif., on Sept. 18, 2012, as he travels to Salt Lake City for campaign events. (Associated Press)

Republican presidential candidate Mitt Romney speaks to reporters in Costa Mesa, Calif., on Monday, Sept. 17, 2012, about the secretly taped video from one of his campaign fundraising events. (AP Photo/Charles Dharapak)

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Republican presidential candidate and former Massachusetts Gov. Mitt Romney speaks to reporters about the secretly taped video from one of his campaign fundraising events in Costa Mesa, Calif., Monday, Sept. 17, 2012. (AP Photo/Charles Dharapak)

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**FILE** Republican presidential candidate Mitt Romney speaks Aug. 30, 2012, at the Republican National Convention in Tampa, Fla. (Associatd Press)

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Republican presidential candidate Mitt Romney addresses the U.S. Hispanic Chamber of Commerce in Los Angeles on Sept. 17, 2012. (Associated Press)

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**FILE** Republican presidential candidate Mitt Romney talks with campaign strategist Stuart Stevens during a podium check at the Republican National Convention in Tampa, Fla., on Aug. 30, 2012. (Associated Press)

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In this Sept. 14, 2012, photo, Republican presidential candidate, former Massachusetts Gov. Mitt Romney campaigns in the rain at Lake Erie College in Painesville, Ohio. President Obama and Romney are embarking on a week heavy with travel through battleground states and appeals key constituencies, with both campaigns wrangling over unrest in the Middle East and who is best equipped to rejuvenate the economy. (AP Photo/Charles Dharapak)

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Republican presidential candidate Mitt Romney and wife Ann, seen here Saturday in Belmont, Mass., taped an interview the day before for TV’s “Live! With Kelly and Michael” that is set to air Tuesday. (Associated Press)