I remember when the Speaker of the House, Bob Livingston, called for Clinton to resign over the Lewinski scandal. Then announced that he too had an extramarital affair, held himself to the same standards, and issued his own resignation. It was about to come out anyway. The investigative journalists at Hustler magazine thought it would be interesting for the public to know how many of the impeachment managers were unfaithful to their wives, and Livingston's name came up.
Livingston was replaced as speaker by Dennis Hastert who, so far as I know, never slept with a woman other than his wife. He did however eventually go to prison for raping little boys who were not his wife.