The mental health of Donald Trump was questioned even before he became the president of the United States. And more mental health professionals begin to express their concern.

Some psychiatrists and other mental-health professionals are shedding long-held norms to argue that Trump’s condition presents risks to the nation and the world. “The Dangerous Case of Donald Trump” features more than two dozen essays breaking down the president’s perceived traits, which the contributors find consistent with symptoms of narcissistic personality disorder, sociopathy and other maladies. “Collectively with our coauthors, we warn that anyone as mentally unstable as Mr. Trump simply should not be entrusted with the life-and-death powers of the presidency,” Judith Lewis Herman of Harvard Medical School and Bandy X. Lee of the Yale School of Medicine write in the book’s prologue.

But even if Donald Trump is not mentally sick, it is clear that the danger he represents to his own people and the entire world is very real. What is not clear, however, why nothing is done to remove him from office.

This slideshow requires JavaScript.