another roy cohn when he died in 1986 from complications of a.i.d.s. in many ways has become his own roy cohn. >> sticking in my brain, deny, attack, delay. those three words are very characteristic and descriptive of the strategy trump has employed perhaps as a businessman but certainly recent days as a politician and candidate, defendant in all these matters. it strikes me as fascinating, the idea of replacing roy cohn, where is my roy cohn? you say he found one in himself when he could not find it externally? >> reporter: it is him, it is not michael cohen or rudy giuliani, it is not anybody. out of the many attorneys that represented donald trump over the last 50 years, it is donald trump himself who was his own roy cohn, perhaps his best pupil