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

VLADIMIR Putin is trying to manipulate Donald Trump to get what he wants, his former White House adviser has warned. John ...

The former national security adviser called for the secretary of state to resign as his "reputation might suffer for a long time." ...

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.