Who:  I'm very happy to oblige.  Here is the definition of "sociopath" from Wikihow. 

 "A sociopath can be defined as a person who has Antisocial Personality Disorder. This disorder is characterized by a disregard for the feelings of others, a lack of remorse or shame, manipulative behavior, unchecked egocentricity, and the ability to lie in order to achieve one's goals."

It would be difficult to find a better description of Mr. Trump's actions and comments.  Look at his personal and business history.  Look at his behavior during the GOP debates.  Look at his actions and comments in all interviews and presentations.  The Donald is the "posterchild" for sociopathic behavior.  

Would you like to make the argument that Trump's well documented behaviors DON"T represent sociopathic behavior?  I'd be very interested in reading that argument.  thanks, Gary