McCain called David Letterman today, and told him he could not do his show tonight because he had to go back to Washington. In the middle of the taping of Dave's show, Dave finds out that McCain is actually doing an interview with Katie Couric at that exact moment. Dave then shows the live feed to his studio audience and says, "Hey Senator, can I give you a ride home?" Running away from the debate and Dave Letterman? I think McCain is losing it.