Don't want to take my word for it? Try the brains behind the National Review, Rich Lowry.
"I have no special knowledge of Pennsylvania politics, but it seems very unlikely that McCain can win there. Maybe internal polls show it differently, but Obama leads by 8-15 points in the latest state polls according to RCP. The more viable scenario would appear to be holding the states Bush won both in 2000 and 2004. This is difficult and leaves no margin for error, but not impossible. In polling from the last two days, McCain is ahead by 1 or behind by 1 in Florida; he's behind by 2 in Virginia; he's behind by 3, by 1, or tied in North Carolina; he's tied in Nevada. If McCain can close the national gap with Obama, it's possible that all these kind of red states could narrowly fall his way. That would leave Colorado as perhaps the hardest-to-get red state and potentially the pivot of the election. A poll yesterday had McCain behind by 5 there, suggesting it's a tough nut to crack but not utterly out of reach. I'd be inclined to pour it on in Colorado rather than Pennsylvania, and attempt to thread the red-state electoral needle."Now, I'll admit this scenario is awfully similar to the one I was pushing back in August...let's just say I'm glad everyone is finally on board. ;-)