Who are the Trump voters?

Most reasonable people, the world over, agree that Trump is bad, but today, my question goes to his “base”. Who are the folks that ended up voting for that man? I'd tend to fit them in 4 slots:

1. The mean-spirited 
A fairly broad category that includes all the racists, xenophobes, ultra-conservative extremists and people that hated Hillary Clinton so much that Trump was their only alternative.

2. The gullible
Group made of religious folks that believe everything they're told under the cover of their faith and also believes politicians who told them just what they want to hear. A pathetic and non-salvageable group of individuals.

3. The idiots
A major block of people that are hopeless and probably all need therapy. They find their nourishment in Fox News and the right-wing talk show hosts, but don't understand basic finances and still believe Trump is a good businessman and a great negotiator.

4. A combination of all three
These are probably the most numerous and the worst and constitute Mr. Trump's hard-core base.

As you can see, the four categories are hopelessly set in their way. You can shame them all you want, but they'll enthusiastically vote again for Trump in 2020!