Elizabeth Colbert Busch Elizabeth Colbert Busch

Former South Carolina Gov. Mark Sanford arrives to give his victory speech Tuesday in Mount Pleasant, S.C. Sanford won back his old congressional seat in the state's 1st District in a special election. Rainier Ehrhardt/AP hide caption

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Rainier Ehrhardt/AP

Democrat Elizabeth Colbert Busch and her Republican opponent, former South Carolina Gov. Mark Sanford, debate in Charleston, S.C., on April 29. Randall Hill/Reuters/Landov hide caption

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Randall Hill/Reuters/Landov

Joe Biden Has History On His Side But Little Else If Hillary Clinton Runs

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Democrat Elizabeth Colbert Busch and former South Carolina Gov. Mark Sanford debate for the South Carolina 1st Congresional special election in Charleston, S.C., on Monday. Randall Hill/Reuters /Landov hide caption

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Randall Hill/Reuters /Landov