Here's a very standard 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."  

Read it.  Look at the actions and comments from Mr. Trump and decide for yourself if they exhibit the classic behaviors of a sociopath.  Frankly, I think his psychological/emotional makeup would make for a very dangerous President.  You don't?