Trump's issue was mostly with the "soccer mom" demographic as Chuck Todd put it on election night. Most of them were put off by Trump's rhetoric and thought he wasn't the right choice, so they voted for Hillary en masse, swinging Orange County, one of the largest counties in the state, into the Clinton column, and keeping Trump away from any remote semblance of competitiveness in the state.
I wonder how that group of people will change 2020. I wonder if they will have accepted trump and either vote for him or just not care too much and not vote at all
My belief is that Trump has abandoned that group, there's no need for him to win them to become President, as 2016 has evidenced, but he does need them if he wants to win in Virginia, Colorado, etc. Trump is basically at his most practical floor with those demographics, if he alienates them, or just pisses them off in any way their sheer numbers will overwhelm the protectionist folks he won in 2016, and cause him to
lose ground in key states as a whole.