Rick Moran survey’s the landscape and finds Republican electoral hopes pinned mostly on the hope that Obama will make a mistake:
There are two more debates where Obama may slip up. That’s just about all McCain has at this point I think. There is also the possibility that some outside force might intrude on the campaign; a foreign crisis of some kind would shift the race from one that is largely about the economy to one that would highlight national security. But I think that a much more remote possibility than Obama saying something stupid that would remind people what a rookie he truly is.
And the probabliliy of that happening is fairly slim as well, I think.
Say what you will about his ideas, but Obama has proven himself to be an adept campaigner, especially since the beginning of the General Election campaign. The idea that he’s suddenly going to start making mistakes serious enough to move massive numbers of voters with only four weeks to go seems fanciful at best.

