The contrast between McCain and Obama last night was instructive, and in ways not favorable to McCain. I’m not speaking of the relative strength of their speaking performances. What I mean is that McCain looked uncomfortable on the attack against Obama, while Obama looked perfectly comfortable, even chomping-at-the-bit eager, in his attack on McCain. It seems that Obama is going to feel free to be extremely aggressive in his assaults on McCain, in part because he knows his slavish supporters in the media are going to continue to accept the contention that he is bringing a new tone of bipartisanship to Washington. McCain is going to have to find a way to deal with this.