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.

Former national security adviser John Bolton thinks that Donald Trump ... individualized cause appears contrary to a reasonable reading of the law, particularly the provisions establishing ...

Former national security adviser John Bolton said on Wednesday that a ceasefire deal with Russia is not “in Ukraine’s interest,” but the war-torn country’s president, Volodymyr ...

The president's former national security adviser told CNN that Trump's threats of sanctions against Russia were empty.