I think Trump has NPD, Narcissistic Personality Disorder. It is less certain that he has Antisocial Personality Disorder under which a sociopath would fall.

Narcissistic personality disorder is indicated by five or more of the following symptoms:

• Exaggerates own importance
• Is preoccupied with fantasies of success, power, beauty, intelligence or ideal romance
• Believes he or she is special and can only be understood by other special people or institutions
• Requires constant attention and admiration from others
• Has unreasonable expectations of favorable treatment
• Takes advantage of others to reach his or her own goals
• Disregards the feelings of others, lacks empathy
• Is often envious of others or believes other people are envious of him or her
• Shows arrogant behaviors and attitudes

I am persistently antisocial a lot and I don't have a lot of empathy for most people, when I hear someone dies I say that sucks to suck but obviously to the person I say that I am sorry for their loss. Am I psycho/sociopath? Lol! But No, it doesn't surprise me that Donald Trump is off his rocker. I mean he debated his dick size on LIVE TV...!!!!! Like... uuugggggghhhhhh! Imagine that ugh as a scream or something or someone bashing their head into A wall. He acts like a child and the whole nuclear button tweet proves it even more so.

He is a sociopath and now he is showing signs of dementia per Morning Joe MSNBC this am. His repetitions have increased, he doesn't recognize people he has known for years and he is having trouble with his speech. A 60 Minutes interview was cancelled in favor of a Sean Hannity interview on fox with him being given the questions in advance. He is not stable and the 25th Amendment should be enacted.

I couldn't help notice that he is, just as an actual president should be, a lightning rod for assumptions-- like the one you are presenting. He is the first actual president since John F. Kennedy--because of his actions and mandates alone. Kennedy had a regrettable end to his...when he was going to sign an order to eliminate the CIA when he returned from Texas. Trump is an actual president. Period.

Yes, I'm no psychologist, but I have always thought he was too. No one can lie like he does, without guilt or awareness, and not be one.

Yes he is, and it is quite obvious and it always had been, long before he stood for president.
Which raises the question: what are the people who vote for a sociopath like him to become the most powerful human being on earth with access to the biggest aresenal of weapons of mass murder?
His voters are even worse than sociopaths in my view. Most of them do not have the excuse of suffering what can be argued is pathological mental condition.