Donald Trump is a liar because he is a coward. It is fear and cowardice that make him lie. it is his fragile ego that makes him lie.

In short Donald Trump lies compulsively in large part because of who and what he is - a coward. This is why Mike Brzezinski said recently, "He brings nothing to the table.

Donald Trump has been called, by psychologists and clinical psychologists, over and over again, a narcissist with multiple sociopathic and psychopathic tendencies.

Lying is second nature to him... More than anyone else I have ever met, Trump has the ability to convince himself that whatever he is saying at any given moment is true, or sort of true, or at least ought to be true.

He who permits himself to tell a lie once, finds it much easier to do it the second time.

I swear to you, by my own stunning good looks and towering ego, that I am not lying to you.