Which in itself is a symptom. It is a form percieved isolation from others. Hence, the anger. People like this can be brilliant. Smart enough to be successful in their professions, but eventually self destructive. I sincerely doubt he understands how he is percieved, even by his own party.
I fully admit I could be wrong. Like I said, such a person does not belong in any form of public life.
While I agree he has no place in public life, in fact he has no place in society, if there is any disease or psychiatric disorder that contributes to his personality it’s a heavy dose or narcissism, combined with anger management issues and most likely some sort of alcohol and/or drug use.
You’d have to see him in person, around his own “kind” to see what I mean. Grayson is very good at putting on a show.