Why is this even a question? It's trending democratic, and democrats will probably do better in 2020 than 2016 overall.
I disagree. The gap closing compared to 2012 was almost entirely because of third party candidates. Hillary only over performed Obama by a couple of points. Never Trumpers took a lot of normal GOP votes away. Even if Trump isn't super popular, a lot of those reluctant GOP voters will come back home barring a major scandal or meltdown. A more establishment GOP candidate or Ted Cruz would have won Texas by a similar margin to Mitt Romney.