Why is this even a question? It's trending democratic, and democrats will probably do better in 2020 than 2016 overall.
But it's not though. The truth is Trump was a bad fit for the state. One election doesn't mean a trend also the Democrats only picked up like one legislative seat in Texas and it was on the State Level. This was in despite the Republican Presidential Nominee Margins collapsing in the state. Do you know what that means? The People of Texas voted as Republican as they alaways do but a lot of them left the President Box blank.