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Palin said the apology was accepted "on behalf of all young women, like my daughters, who hope men who 'joke' about public displays of sexual exploitation of girls will soon evolve."
On his CBS' Late Show on Monday night, Letterman said his joke about one of Palin's daughters being impregnated by Alex Rodriguez can't be defended.
It was "a coarse joke," "a bad joke," Letterman told his audience on his Monday's show, admitting that the joke "in and of itself, can't be defended."
He said the joke referred to 18-year-old Bristol Palin, not her 14-year-old sister Willow. But Letterman said it's his responsibility that people believed that he intended to target Willow, who had attended a New York Yankees game with her mother.