There was a terrific Frontline program on last night called The Choice 2016 with profiles of Clinton and Trump. One of the things I was aware of, but hadn't fully appreciated, was the influence Roy Cohn had on the Donald Trump we see today.
http://www.pbs.org/video/2365848966/
Trump hired Cohn to defend him and his father against pair's anti-Black rental policies. Apparently, one of the first questions Trump asked Cohn was whether or not he should settle. Cohn's response was immediate and emphatic. He said that Trump should never settle, should never admit guilt, and should come out punching in all directions and as hard as he could. It didn't matter what he hit with, as long as he kept hitting. His opponents would eventually give up.
Trump took that advice, including denial even in the face of proof and, as far as I know, has followed that policy to this day. Cohn's influence on Trump was remarkably long-lasting.
Trump retained Cohn until Cohn's death and kept a particularly frightening picture of Cohn in his desk drawer. He would pull it out and show it to those who opposed him in any of his "deals" and said that's who they would be dealing with in court.