If Obama's lost Ohio, then Missouri and Virginia are both probably out of reach. Colorado and Nevada would both still be possible.
I don't get why so many people are convinced that McCain will win Ohio, though. The economy is a huge issue there, and look at how Democratic it went in 2006...I guess I'll believe it when I see it.
I understand Obama did well in Colorado and those two western states will be in play, but Obama's gonna need to improve his standing with hispanics if he wants a shot at winning thos two states in november.