Briefly, the parts of the map that voted for Trump are largely known as flyover country. To oversimplify things, the people in this area have been neglected and talked down to by some portion of the political apparatus as far back as they can remember.

In some cases, the vote for Trump wasn't meant to be anything more than punitive. To get a rise out of the politically aligned groups that can afford to fly over and - literally - look down on.