David Letterman has finally succeeded in his quest to have Republican Presidential candidate George W. Bush as a "Late Show" guest. The politico is due to take the seat next to Dave's on Oct. 19. In March, Bush had promised Letterman a face-to-face interview during a satellite appearance from St. Louis, but balked when he was asked by Letterman to debate Democratic hopeful Al Gore on the "Late Show" in July. Gore recently appeared with Dave and read that night's Top 10 list. With Bush now set to do the show, "we expect that all undecided voters will now be decided," the program's Maria Pope told the New York Post. "If nothing else," she added jokingly, "we have hopefully guaranteed a sleep-over in the Lincoln bedroom."