In early 2019, at a memorial service for a prominent psychiatrist, a succession of “doctors and other mental health professionals” told Nancy Pelosi they were “deeply concerned that there was something seriously wrong” with Donald Trump, “and that his mental and psychological health was in decline”.

“I’m not a doctor,” the former speaker writes in an eagerly awaited memoir, “but I did find his behaviors difficult to understand.”

Pelosi’s book, The Art of Power: My Story as America’s First Woman Speaker of the House, will be published next week. The Guardian obtained a copy.