David Letterman mumbles his way through an apology of sorts about the controversial joke he told regarding Sara Palin's daughter last week. Letterman clearly seems bothered by all thew hubbub and you can almost feel sorry for the old guy.

When he says he thought the joke he told was about Sarah Palin's 18 year old daughter, the Believability Meter says he's sincere. But when he tries to go step further and claim that he checked ahead of time before the show to be sure, the Meter cries foul. Either way, Letterman has lost his edge big time it seems. Do you watch him anymore?