The controversy continues over David Letterman and Sarah Palin. This week, he’s under fire for a risque joke told on his late night show, David Letterman has apologized to Gov. Sarah Palin and her supporters. But a group urging CBS to fire the host says it’s still not enough.

On CBS’ “Late Show” tonight, Letterman says he’s sorry about a monologue earlier this month in which he joked that New York Yankees star Alex Rodriguez impregnated Palin’s daughter during a game. Letterman has said he intended the joke to be in reference to Palin’s 18-year-old daughter Bristol, but Gov. Palin actually attended the game with her 14-year-old daughter Willow. Some critics have accused Letterman of joking about statutory rape.

“I told a bad joke,” Letterman told viewers at an afternoon taping. “I told a joke that was beyond flawed, and my intent is completely meaningless compared to the perception. And since it was a joke I told, I feel that I need to do the right thing here and apologize for having told that joke. It’s not your fault that it was misunderstood, it’s my fault.” He concluded, “I’m sorry about it and I’ll try to do better in the future.”

A member of a zealous group, John Ziegler, is trying to get David Letterman fired. Seriously? Yes, it was a tasteless joke but he’s an icon. Hopefully, this will blow over by next week.