Trump is an unorthodox genius who really knows how to win, as shown by the fact that he won the highest office in the world.
No. American voters are just stupid.
That’s not fair since most of us didn’t vote for him.
Seriously though, Trump won by a combination of cheating, dumb luck, old school snake oil con man tactics, and exploiting fear-mongering/race-baiting in a polarized nation. Any crass and conscienceless idiot who saw the opportunity could have done that. He just happened to be the first and richest.