You could call it “psychology” but I prefer the term human nature. Psychology brings to mind people in white lab coats doing endless research and experiments, constantly analyzing, and bearing little fruit that reaches the masses of mankind. Human nature is what the Founders understood and it is why they wrote the Constitution the way they did. If our President understands human nature better, he will be inclined to be more of one mind with the Founders and continue the work they began, rather than divert from it.