John Bolton was there during Trump's first term ... BOLTON: Thanks for having me. (SOUNDBITE OF MUSIC) KELLY: And a note - NPR reached out to the White House in response to Bolton's remarks.

John Bolton, who served as national security advisor to President Donald Trump during his first term in office, slammed his former boss for the U.S. voting with Russia and North Korea against a UN ...

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.