Trump learnt that from Roy Cohn. You can watch 'based James Woods' play him in the movie citizen cohn. It's delivered from a leftist point of view but there is enough in there to see Cohn was a based jew, who happened to take it up the ass, I doubt he ever felt any guilt about killing the commies. Anyway, a good film blessed by kek himself.
http://123-putlocker.com/watch/qd77wpdK-citizen-cohn.html
Ps. Nixon started the whole Mccarthy senate hearings. He distanced himself as he was too exposed in his leadership position but it came from Nixon, who also wrote a letter to Trump asking him to run as President (now framed in the oval office) and he also knew Cohn very well. The more you know.