Thread by @gtconway3d

Under the DSM-5, the diagnosis of a personality disorder requires a finding that a person suffers "clinically significant distress or impairment in social, occupational, or other important areas of functioning."

https://twitter.com/michaelcbender/status/1314921879686258690

The only prominent mental-health professional I know of who has ever disputed that @realDonaldTrump suffers from a Cluster B personality disorder such as Narcissistic Personality Disorder is Allen Frances, who argued that ...

https://twitter.com/michaelcbender/status/1314921879686258690

... @realDonaldTrump isn't impaired in his social or occupational functioning, even though he's unquestionably a "world-class narcissist."
nytimes.com/2017/02/14/opi…

That argument has always lacked factual foundation: consider Trump's failures as a businessman, and blundering over the past four years as president, which virtually all can be traced to his narcissism and sociopathy in some significant respect.

https://twitter.com/MichaelCBender/status/1314921879686258690

But the error in Frances's assessment has never been more apparent than it is today.

https://twitter.com/MichaelCBender/status/1314921879686258690

There can really be no question today that the president of the United States is mentally ill.

As I wrote in @TheAtlantic a year ago this week, you don't have to be a mental health professional to figure this out.
theatlantic.com/ideas/archive/…