Disarmed with a Donut
I made a similar case last week.
Christie's appearance on the show is even more striking when you recall that Letterman repeatedly begged Romney to come on his show last year. By October Letterman was openly taunting Romney during his monologue, "if you're worried about coming here, is that the guy you want in the Oval Office?"
Of course Letterman was in-the-tank for Obama. Most of the media culture is against us most of the time. I don't think that's news to anyone reading this. That's all the more reason to pick a candidate who can enter hostile territory and come out with a win or at least a draw. If you make a list of potential 2016 Republicans candidates who fit that bill, you'll find it's a fairly short list.