This is an interesting article in The Washington Post but I think it misses a key feature of Trump's support. The piece talks about whether or not people are better of in "Trump country" than they were before. The conclusion is that the answer is "No" based on a year or so of data.

The tendency among those of us living in the real universe is to ask why in the world these people can't see this. Based on what I've seen from my conservative friends on social media, I think many of them do see it. Furthermore, I don't think a lot of them voted for Trump because they thought he'd make the real world any better. Rather, as long as he is--at least as they see it--owning the Libs, spewing racial and ethnic hate, validating their feelings of entitlement and victimhood, and just generally being an asshole, they are in full support.

They accept the fact that they continue to fall behind. Trump just gives them lots of scapegoats.