The proudest moment in his career, Late Show writer Bill Scheft boasted at a Friday comedy writer panel held at Washington, DC's Newseum, was when he got David Letterman to try to undermine guest John McCain's Bill Ayers talking point by raising McCain's relationship with G. Gordon Liddy -- as if a political dirty trickster were the equivalent of a terrorist involved with bombings which killed people, could have killed hundreds more if his attempts worked and remains unrepentant. At the event, organized by the Writers Guild of America, East, and shown Saturday night on C-SPAN, Scheft declared of his effort to discredit an anti-Obama point: “I'm more proud of that than any single joke that I've written.” That earned applause from the audience.