With CIA Director David Petraeus resigning over an affair, look back at some of the biggest political sex scandals.
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Reuters
In March 2007, former House Speaker Newt Gingrich admitted in an interview that he was having an extramarital affair during the same period as when the House investigated and then impeached President Bill Clinton for his conduct with White House intern Monica Lewinsky. Gingrich divorced his second wife in 2000 after his attorneys acknowledged his relationship with his current wife, Callista Bisek, a former congressional aide.