—Natalie Hull, Covington
A: Gingrich was a member of Congress from 1979-99 and the Speaker of the House from 1995-99. He resigned after a string of incidents. He was blamed by some for partial governmental shutdowns in 1995 that were a result of his refusal to compromise with President Bill Clinton on budget cuts, according to biography.com. Gingrich also came under scrutiny from the House Ethics Committee, which questioned a $4.5 million book advance he received and then returned, and investigated tax-exempt donations that Gingrich had used to pay for a college course he taught while in Congress. Gingrich paid $300,000 for the cost of the investigation and was reprimanded by the House. He pushed hard for Clinton's impeachment after the Monica Lewinsky scandal in 1998, but his popularity began to wane, including among fellow Republicans, and he stepped down as Speaker of the House in 1998. He resigned from Congress in January 1999. Later that year, it was reported that he had a six-year affair with Callista Bisek, who became Gingrich's third wife in 2000.