I keep hoping Trump does have some cognitive decline. It's even likely.
Yet, when I listen to him what I hear is hypnotic patter. Voice cadencing to soothe and trance followers. Statements that meander and never quite finish so that people stop trying to make sense, and just give up and trust his authority. Because surely He must know. He sounds so confident. So they stop thinking and sink further into trance, hearing only simple commands like to hate.