It’s more of an urban/rural divide than anything else.

In cities, you can see your tax dollars at work; there’s public transport, street repair, libraries, etc. In rural areas, you don’t; so they see government as taking their taxes and not giving them anything in return. We could argue that national defense helps them, and law enforcement helps them, but these are not as visible as public works projects. In most rural areas, law enforcement will not arrive fast enough in an emergency, so they rely on gun ownership for self-defense.

In this light, the D and R labels seem more like a symptom than the cause. I post this mostly to get us thinking of other ways to talk to any remaining rural voters who are not yet subsumed by the cult of Trump.