Norman Vincent Peale yes, but also Roy Cohn. And Cohn was insidious in his persistent misbehavior and was a mentor to Trump. (He was a nasty piece of work, largely responsible for convicting the Rosenbergs, and then serving as counsel for Joe McCarthy.) And I bless Tony Kushner for his Angels in America and making Cohn a major character with enough of his bad behavior in view to educate a newer generation. Of course that was a couple of decades ago now - it's time for a revival to teach the newest voters about Trump's most important "influencer."