"Yes, but the Invisible Hand of the..."
::conservative hangs head in shame.::
But it finally crystallized for me, why he's such a disaster.
He tries to rule with his heart, and not his head. This is singularly difficult for a man who has no heart.
He is certainly not an intellectual; even his most generous apologists note that he is incurious and inclined to make decisions based on his own values and sentiments rather than reason. But if you're going to "go with your gut" on everything, it's particularly troubling when said gut inevitably points towards bellicosity and avarice. Tinman for President! If only he had a heart...