I read in an article recently that spoke to the qualities of Narcissism and Sociopathy. One stood out above the rest and seems quite relevant when trying to understand Trump.
We all misunderstand what people say from time to time. But the narcissist and sociopath will intentionally say things they know will set you off. Then when you react, they’ll turn it around on you and blame you for misunderstanding. Oftentimes, they’ll even deny that they ever said it. This is called gaslighting—blatantly doing or saying something, and then blaming you for misinterpreting it (or denying that it even took place). The fact is, you understood what they said perfectly fine. They’re just trying to make you doubt your sanity.
The original article can be found here: http://dailyvibes.org/words-narcissists-undermine-confidence/?c=hp