1973 'Goldwater rule'

"The psychiatrist who helped craft the 1973 'Goldwater rule' that has
kept many mental health professionals from opining on Donald Trump for
nearly a decade said that it was not intended as a hard-and-fast
prohibition, and that if he were Trump's doctor, he would order a full
battery of tests to determine the cause of what he believes could be
the former president's dementia. 'He seems to be progressively
cognitively impaired,' said Allen Dyer, a retired George Washington
University psychiatry professor."

https://x.com/gtconway3d/status/1848793304902865103