Many psychiatrists and psychologists have reflected about the personality of Donald Trump and whether or not he is a borderline personality and narcissist.
Below is an excellent article from last week's NY Times that discusses the Narcissistic Personality Disorder.
The Narcissist Next Door – By JANE E. BRODY – NYTimes – July 18, 2016
Know anyone who is highly competitive, and portrays himself as a winner and all others as losers?
http://well.blogs.nytimes.com/2016/07/18/the-narcissist-next-door/?em_pos=small&emc=edit_hh_20160722&nl=well&nl_art=0&nlid=61675258&ref=headline&te=1
I have learned to stay clear of narcissistic people as they are very difficult to deal with, impenetrable to constructive criticism, lack self-insight, criticize everyone around them, take no responsibility for themselves, and insist that everyone accommodate to them at all times.