When David Letterman spends ten minutes of his show calling you a quitter (“This is not the John McCain I know”), and stops in the middle of an interview to cut to live video of you caught in a lie (“Hey, John, do you need a ride to the airport?”), your screw-the-media strategy may be backfiring.
This strikes me as worse than the The View debacle two weeks ago. McCain could pass that one off as a biased panel who unfairly ambushed him. But Letterman, in between shots, keeps calling McCain an “honest to God hero.” He’s speaking more as a disappointed friend than someone with a political ax to grind. I’m guessing this will do some damage with low-information voters– the ones who aren’t big on issues, but instead vote for the candidate they like and trust the most.