Trump is a narcissist, voted for by his core base as a vehicle to vent their anger towards the "swamp".  He truly believes, in a kind of perverted way, and only in his mind, that he is a scapegoat for the left, democrats who cannot accept their "loss".  

" The scapegoat builds their identity on the constant stream of information they receive about their ‘badness’.  They may know inside that they haven’t done anything to warrant this treatment, but it seems that no-one else sees this. As a result they feel insecure and unsafe, making them very vulnerable." (Leanne Chapman, psychologist).  Now make this scapegoat a narcissist, or worse a sociopath.  Then you just might have Trump.