Sarah Palin vs. David Letterman (2009): David Letterman touched a raw nerve when he made an off-color joke referring to the Palins and their trip to see a Yankees game, jesting that “during the seventh inning, her daughter was knocked up by Alex Rodriguez.” The unamused former vice presidential candidate slammed the remarks, calling them “sexually perverted” and “disgusting.” The comedian later apologized, but not before inviting Palin to his show. “I’d love to have you on the show,” he said. “It’d be exciting.”