One final last point Dan, If your child was brought to a hospital emergency room and appeared to be abused, the ER doctor ethically must inform the police of child abuse. If a man is walking around on the street threatening others with a gun, it is the responsibility of anyone to inform the police.  Psychiatrists have a special responsibility to warn when someone is a danger to self or others. Mr. Trump has displayed emotional instability, on nearly a  daily bases and this whole group of emeritus psychiatrists felt it was their ethical and perhaps even legal responsibility to warn those who could do something about it.  That is why they wrote a common letter to the members of Trump's Cabinet, the VP, and the Republican and Democratic leaders of both houses of Congress.    They made no diagnosis but warned of the severe symptoms. It was certainly the more ethical thing to do even though they had not examined him personally... See Dr. Lifton's explanation on the web link I provided.