Doesn't matter if he is a businessman or not, he's not looking for the best deal for the US only himself and with the power he yields any deal that benefits him personally is a good deal, even if it screws the country up. In fact he's utterly incapable of thinking about anything but himself because he's a narcissist.

Dementia Trump seem to think he is still in the apprentice, you don't get to fire other sovereign nations presidents though.