To the Editor:
Fevered media speculation about Donald Trump’s psychological motivations and psychiatric diagnosis has recently encouraged mental health professionals to disregard the usual ethical constraints against diagnosing public figures at a distance. They have sponsored several petitions and a Feb. 14 letter to The New York Times suggesting that Mr. Trump is incapable, on psychiatric grounds, of serving as president.
Most amateur diagnosticians have mislabeled President Trump with the diagnosis of narcissistic personality disorder. I wrote the criteria that define this disorder, and Mr. Trump doesn’t meet them. He may be a world-class narcissist, but this doesn’t make him mentally ill,