I mean, elephant in the room is that a lot of people who have no problem voting for other Democrats weren't going to vote for a Black candidate, so I'm not sure they're any more "dead" to ALL Democrats than they were pre-Obama. But just looking at their local politics, Tennessee looks to be the most dead.
In fact, I would say Tennessee is the ONLY one that's *completely* dead. Democrats are currently defending Senate seats in every other one, and four of them have Democratic governors.
I share your opinion. The other five states regularly elect Democrats to statewide offices. Tennessee doesn't. It didn't even vote for its favorite son in 2000.