Maybe he wouldn't have anything to do.

Sure maybe McCain is trying to score some political points with this, but for him and his message it does make sense. Obama's reaction to it though really confused me, but the more I think about the more this makes a lot of sense. Obama has no juice in the Senate. John McCain has been there for years and is without doubt a mover and a shaker, but Obama's been there for maybe four and has spent at least half that time on the road shaking hands, kissing babies and tossing former supporters under whatever bus happens to come along. It's not at all clear to me that if he went back to Washington to help deal with this crisis he would actually have anything to do. He doesn't have relationships to call on and doesn't have favors or chips to call in. As I said earlier, he might not even remember where his office is.