Since US President Donald Trump took office, there has been a slew of books describing the chaos in his administration.

The Room Where It Happened is the first-hand account of John Bolton, former US National Security Advisor, and he doesn't hold back from excoriating Trump's performance.

John Bolton joined us on The Last Word to talk about Trump's presidency, why so many Republicans continue to stand by him, and why he has trouble distinguishing his personal interest from the national interest.