Mark Sanford

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In this Dec. 18, 2013, file photo, U.S. Rep. Mark Sanford, R-S.C., discusses his first months back in Congress during an interview in Mount Pleasant, S.C. (AP Photo/Bruce Smith, File)

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MARIA BELEN CHAPUR - Former South Carolina Gov. Mark Sanford, with his fiancee Maria Belen Chapur at his side, addresses supporters in Mount Pleasant, S.C., on Tuesday, April 2, 2013, after winning the GOP nomination for the U.S. House seat he once held. Sanford is trying to make a comeback after his political career was derailed four years ago when he disappeared from the state only to return to admit the couple was having an affair. Sanford's wife, Jenny, later divorced him. (AP Photo/Bruce Smith)

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Former South Carolina Gov. Mark Sanford speaks during the NAACP 1st Congressional District political forum on Tuesday, April 30, 2013, in Goose Creek, S.C. (AP Photo/Rainier Ehrhardt)

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** FILE ** Mark Sanford is headed back to Washington for this second turn in the House of Representatives, this time with fiancee Maria Belen Chapur at his side. (Associated Press)

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Former South Carolina Gov. Mark Sanford gives his victory speech in Mt. Pleasant, S.C., on on May 7, 2013, after winning back his old congressional seat in the state's 1st District. (Associated Press)

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Former South Carolina Gov. Mark Sanford is greeted by supporters as he arrives to give his victory speech on Tuesday, May 7, 2013, in Mt. Pleasant, S.C. Sanford won back his old congressional seat in the state's 1st District in a special election. (AP Photo/Rainier Ehrhardt)

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Former South Carolina Gov. Mark Sanford is greeted by supporters as he arrives to give his victory speech on Tuesday, May 7, 2013, in Mount Pleasant, S.C. Sanford won back his old congressional seat in the state's 1st District in a special election. (AP Photo/Rainier Ehrhardt)

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Former South Carolina Gov. Mark Sanford speaks with a vendor at the Mount Pleasant Farmers Market in Mount Pleasant, S.C., Tuesday, May 7, 2013. He faces Elizabeth Colbert Busch, the sister of political satirist Stephen Colbert, and Green Party candidate Eugene Platt, in Tuesday's balloting. (AP Photo/Rainier Ehrhardt)

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Former South Carolina Gov. Mark Sanford, right, speaks with voter Travis Holt, a mechanic with the U.S. Air Force, at Orlando's Pizza in Daniel Island, S.C., on Monday, May 6, 2013. Server Kevin Caughman works at rear. Sanford is making his last campaign push against his Democratic opponent, Elizabeth Colbert Busch, before Tuesday's special election. (AP Photo/Mic Smith)