To put it simply, Ohio can go Democratic in 2008. We've fallen apart in Tennessee, I don't hold out much prospects of any Democrat taking that state.
That may be true about Tennessee, but you also have to go back and look, yes, Al Gore did lose his home state in 2000, but Kerry was just a horrible candidate, but Edwards could probably have put Tennessee a little closer. It wouldn't have been a tossup, but it might be more of a lighter shade red as opposed to blood red like its southern neighbor of Alabama.
Ohio can very easily go Democratic in 2008. Just look at how close they came in 2004 when the Kerry camp was contemplating a recount.