Spotted in the transcript of CNN's pre-debate discussion:
BLITZER: John, a quick thought from you, John Roberts?
ROBERTS: Well, it will be interesting to watch how John Edwards and Barack Obama comport themselves tonight. They know that there is a crack in Hillary Clinton's suit of armor. Can they get inside there and wedge it open just a little bit more? It is a natural for John Edwards to go in and try and do that. Barack Obama, he has a different personality.