I think the McCain campaign knew the Couric interview would be a disaster as soon as it was done taping and spent much of the day frantically trying to think of a way to push it out of the headlines. The clincher for me is the fact that McCain cancelled his Letterman appearance at the last second and instead sat down for an impromptu interview with, of all people, Katie Couric. The hope was to bump the Palin interview even on the CBS Evening News, which otherwise would have hyped and teased the Palin interview all afternoon and used it to lead the broadcast. Instead, CBS devoted most of its coverage to McCain and played segments of the Palin interview almost as an afterthought. Mission accomplished.