US President Donald Trump spoke about his ex-national security advisor John Bolton and noted that people think Bolton is 'crazy because all he wants to do is bomb people,' Daily Mail reported.

'People think he's crazy because all he wants to do is bomb people, he'll fight everybody. "Let's fight Russia, let's fight China, let's take them on." He's crazy.'

'When I walked into a room with him, I knew that when they saw Bolton they always gave me what I wanted because they said "Trump's gonna drop bombs on me because he has this maniac with him."

So in a way he helped me in terms of a negotation.'