The "Goldwater rule," named for 1964 presidential candidate Barry Goldwater, prohibits psychiatrists from offering opinions about the mental state of public figures.

A leading psychiatry group has told its members they should not feel bound by a longstanding rule against commenting publicly on the mental state of public figures — even the president.

The statement, an email this month from the executive committee of the American Psychoanalytic Association to its 3,500 members, represents the first significant crack in the profession’s decades-old united front aimed at preventing experts from discussing the psychiatric aspects of politicians’ behavior. It will likely make many of its members feel more comfortable speaking openly about President Trump’s mental health.