Dr. Bandy Lee of Duty to Warn, along with multiple colleagues, posted this urgent plea.

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7. She has credentials and is an expert in the workings of the criminal mind.

In this video, she says:
“There should be no remaining doubt. Donald Trump is exhibiting destructive, escalating, and world endangering mental instability. This is no longer a psychological theory, but an imminent threat to our fundamental survival, and to the safety of the entire globe.”

There’s more, and it’s worth the seven minutes it takes to watch the entire video.

Aside from being fearless, the good doctor has credentials:
“Bandy Xenobia Lee is an American psychiatrist whose scholarly work includes a textbook on violence. She is a specialist in public health approaches to violence prevention who consulted with the World Health Organization and initiated reforms at New York's Rikers Island Correctional Facility.”
Source: Wikipedia