1. South Carolina Governor Mark Sanford
He cried, he apologized to his kids, his wife, the state, his best friend and his in-laws. He then proceeded to give a play-by-play of the entire romance, including when he started sleeping with her.

Bonus points: In an effort to avoid using his mistress's name, Sanford went for much of the press conference without using a gender specific pronoun, causing many people to speculate that he was gay.