(National Enquirer/Getty Images)
Former Colorado Democratic Sen. Gary Hart is also a two-time presidential candidate who saw his campaign derailed by an extramarital affair. During the primary campaign leading up to the 1988 presidential election, Hart was accused of having an affair with a model named Donna Rice. He denied the charges until the press printed a photograph of Hart with Rice sitting on his lap. He dropped out of the primary race in May 1987 only to try and resurrect his campaign just in time for the primaries, but dropped out finally after poor showings in early states. Hart remains married to his wife, Lee.