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David Letterman apologized on Monday for making a sexually charged joke about one of Alaska Gov. Sarah Palin's teenage daughters, as a group of Palin supporters planned a rally demanding the late-night TV show host be fired.

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It all started on Monday when David Letterman told some off-color jokes about Alaskan governor Sarah Palin and her daughter. Dave made some cracks about one of the Palin girls having to fend off Eliot Spitzer and getting knocked up by Yankees star Alex Rodriguez during a recent trip to the Big Apple.

Alaska Gov. Sarah Palin is on the offensive against 'Late Night' host David Letterman for an off-color joke he made about her daughter and Alex Rodriguez.

Freelance writers send in jokes, hoping to hear them on TV. The pay? $75 to $100. It may violate the WGA's contract, but enforcement is tough.

"Beautiful day in New York City," David Letterman mused on the "Late Show" recently. "Am I right about that? A gorgeous day.

The late-night host was back at work in New York on Monday to deliver the news -- and a few jokes about the marriage.