Psychiatrist Dr David Reiss described President Donald Trump as "deranged" and questioned whether he should hold the responsibilities of the presidency in an AlterNet interview published on 19 September, using a family-dinner hypothetical to illustrate his concerns about Trump's public behaviour.
Reiss, who has maintained a private psychiatric practice and contributed to the 2017 book The Dangerous Case of Donald Trump: 27 Psychiatrists and Mental Health Experts Assess a President, did not identify a specific psychiatric diagnosis in the interview. Instead, he argued that the diagnostic label was less important than what he viewed as Trump's observable conduct.
