Trump has a homemade swing that works for him. He was on Hank Haney's Golf Channel show years ago and Hank analyzed his swing. As I remember Trump's only swing thought was to move his hips.
I've seen him on TV play in some celebrity tournaments. He can play. But Faxon, Sorenstam and Els say he's between an 8-10 capper.
Now as far as self aggrandizing, exaggeration, lying, cheating and self delusion he's a plus handicapper. Natural born. Can't teach that.