Trump has a dangerous disability - George F. Will interview MSNBC

Seriously, I don't like George Will, nor at all respect him, but this, I think, he has got just right:  Trump cannot think or talk rationally.  This is a graver and more fundamental assessment of Trump than the psychiatric diagnosis ("malignant narcissism") which has lately received popular attention, and it better explains and accounts for more of Trump's speech and behavior.  Knock as you will, there's nobody home.