Trump has a Malignant Personality
These people are mentally ill.
They are habitual liars and are incapable of either knowing or telling the truth about anything.
They are egotistical to the point of narcissism and really believe they are set apart from the rest of humanity by. They scapegoat: they are incapable of either having insight or willingness to accept responsibility for anything they do.
Whatever the problem, it is always someone else's fault. They are remorselessly vindictive when exposed.
Genuine religious, moral or other values play no part in their lives. They have no empathy for others and are capable of violence.
Under older psychological terminology, they fall under the category of Psychopath or Sociopath.