The book by CNN's Jim Sciutto also contains quotes about the former president's reported "admiration" of Hitler.

John Bolton, a former National Security Advisor in President Donald Trump's first term, said his ex-boss is cognitively damaged. The post John Bolton Says Trump’s Brain Is Cooked: ‘His Mind Is Full of ...

ZELENSKYY: You think... TRUMP: You're gambling with World War III. SIMON: John Bolton joins us now. Mr. Bolton was ambassador to the United Nations during the George W. Bush administration.

NPR's Scott Simon talks to former National Security Adviser John Bolton about the foreign policy implications of Friday's shocking press conference between President Trump and President Zelenskyy.