We live in a moment of history when the leader of the free world (as the president of the United States is so often called) may hold in his hands the future path of democracy, the fate of millions all over the world, and, ultimately, the fate of our planet. And that fact, I think, trumps (sorry) all the caveats about diagnosing someone whom you have never seen. It is a time that anyone who can see the dangers posed by this man has a duty to speak...