G. Gordon Liddy is a former FBI agent who supervised a break-in at DNC headquarters in the Watergate scandal. He served four and a half years in prison for the crime, which was more time than any of the other conspirators.The Watergate Files: G. Gordon Liddy Liddy now has a talk radio show that plays on 232 stations nationwide.WashingtonPost.com: G. Gordon Liddy

John McCain has been criticized over his friendship with Liddy, who has told his listeners to aim guns at the heads of Federal agents if they come to seize firearms.TV Eye: McCain: 'I Screwed Up' but 'Can't Explain' (October 17, 2008)

McCain appeared on Liddy's radio show, and Liddy referred to him as an "old friend."The Huffington Post: Ayers and the McCain - G. Gordon Libby Symbiosis (October 13, 2008) The two posed for pictures together in May 2007. Liddy has made at least four contributions to McCain's campaigns, including $1,000 for his 2008 presidential campaign.Chicago Tribune: With Friends Like These... (May 4, 2008) On David Letterman's show in October 2008, Letterman confronted McCain about his relationship with Liddy. McCain said that he was open about his relationship with Liddy and that Obama tried to deny his relationship with Bill Ayers. McCain also said that Liddy "...paid his debt. He went to prison and paid his debt, as people do. I'm not in any way embarrassed to know Gordon Liddy."TV Eye: McCain: 'I Screwed Up' but 'Can't Explain' (October 17, 2008)