While the debate is supposed to be centered on his strong suit, I expect him to get sandbagged by the moderator. In addition, with no “crisis” deal in place, McCain will be labeled as indecisive on appearing for the debate.
That's not really Jim Lehrer's style as a moderator. He's a well mannered fellow who asks fair questions. I can't recall him ever pulling a gotcha stunt in any of the debates he's previously moderated.