Trumph has a deep mental problem, he feels the need to be in control of everyone around him, and has extended this to the way he runs this country. I am sure that many psychiatrist find him an interesting subject to discuss about whenever they meet.
And I'm sure psychologists agree that Trump has acute narcissism. On top of that he is probably a sociopath. And I'm being serious. The real question is whether or not there is yet more psychopathy or mental health issues on top of all that; like megalomania and delusional disorder (delusions of grandeur).