The point is that Trump always laughs AT other people.Is that supposed to be an example of a sense of humour?
He is a bully. It is always mockery, or triumphant.
He has no ability to laugh AT himself whatsoever, and he has so little ability to empathise with normal people, that he rarely laughs WITH them, unless he is the cheerleader.
He does not have a sense of humour, dry or otherwise. That requires a sense of the absurd, and a knowledge of social standards. He doesn't have either.
I suspect Trump's idea of great comedy is watching a blind black war veteran fall down a open manhole.