"I did not have sexual relations with that woman."
With those words, President Clinton didn't just dig himself a hole, he stole a backhoe, dug a really deep hole, drove the backhoe into the hole, wired the backhoe with explosives and blew it up. Strenuously denying his affair with White House intern Monica Lewinsky at a January press conference, Clinton was later impeached by the House of Representatives for lying about the matter under oath.