I've read the book by his niece Mary Trump, who is a psychologist detailing Trump's early life. His father scarred him with harsh treatment where 45 learned to be a bully from a bully and that losing or admitting defeat or that he was wrong was unacceptable.
This book details how mentally ill Trump really is. It's all encompassing and totally frightening that this man was allowed to be president and IS seeking the office again. We all saw what he was like the first time around. This time it will be much worse because he is rapidly declining mentally.
There is also a video "DUTY TO WARN" which also has psychologists, military officers who served in his administration and others who say that THIS MAN IS NOT MENTALLY FIT TO BE PRESIDENT!