Making assessments about a person's sanity is difficult, even for trained professionals who have access to the subject and their cooperation with the investigative process. So with all due respect, for you or anyone else to presume to be qualified to or capable of making that judgment with a (forgive me) complete lack of any professional training in that regard or pertinent relevant research (detailed personal information gathered from extended interviews / testing) is about as absurd as it gets.
For a formal diagnosis, sure.
But that doesn't mean I can't evaluate his actual, observable behavior for myself. And his preposterous behavior shows me that he's neither mature nor disciplined enough to be president.