Phil Bredesen 2018 = Evan Bayh 2016
Low IQ Republicans aren't turning out without boogeyman Obama and Clinton on the ballot
Democrats discovered that the much vaunted Obama coalition did not turn out in midterms. Trump supporters will learn the same lesson in 2018. Trump cultists will not turn out if their orange god is not on the ballot.
Actually, I think a big part of Trumps Coalition, which remember only got him to 46.5% of the vote, were number of folks who voted for Obama at least once, usually twice, but we're disillusioned by the continuing disintegration of the country's industrial job base and the role foreign trade has to play in it. Trump's running as a populist fighting for manufacturing jobs 1 a number of those voters over as we saw in places like Trumbull County Ohio and Oakland County Michigan. However, his governing as a billionaire plutocrat has chased away most of such voters who were willing to give him a shot.
Such voters were concentrated in the industrial Midwest and to some degree in the Northeast, so I'm not sure how much that'll play in Tennessee. But to what degree it does, those voters are likely to show up for the orange god-king in 2020 either.