What is the primary mandate of a president or any leader for that matter? In a word it is judgment. A president need not be an expert in any particular field, but he must be capable of recognizing experts who are and surround him with them. Not just experts in highly technical fields, but folks well versed in history, politics, international relations and the human condition. This of course is in addition to what must be his own inherent wide ranging curiosity and general storehouse of knowledge upon which to make momentous decisions.
But here is the hardest part of all; he or she must be capable at critical times of putting aside mind-fogging ego in order to best attend the nation. Nothing can upset the decision making process more than self-serving ego. And by this definition of a good leader, it means that there is no one home at the White House; the nation is flat broke when it comes to leadership.
Millions upon millions are spent gathering data so that our president, should he have just reasonable smarts, may be capable of weighing a plethora of information and come to the best possible decision. With Donald J. Trump all that work of gathering information is wasted; he knows best without reading a word of it. He is a black hole where information goes to die.
Trump claims that he decides issues with his gut. In other words, he is, indeed, the mindless moron that serious, intelligent folks who have tried to work with him have blurted out about him. (It is as if everything that Trump says and does is a Putin induced post hypnotic suggestion meant to destroy America and her allies.) Yes, my friends, the White House might as well be an empty building for all the good it is doing the nation at present.