Andrew McCabe tells Colbert that nothing in past 2 years has made him ‘less suspicious’ Trump is a Russian agent
Former FBI Deputy Director Andrew McCabe being interviewed by Stephen Colbert on 'The Late Show' (screengrab)

The former deputy director of the FBI joined "Late Show" host Stephen Colbert on Tuesday to discuss his new tell-all book.

Andrew McCabe is the author of the book The Threat: How the FBI Protects America in the Age of Terror and Trump which was officially released on Tuesday.

The host asked McCabe about special counsel Robert Mueller's probe into President Donald Trump's campaign and actions in the White House.

"Is there anything in the last two years that makes you less suspicious of the president? Or is less indicative that he had an improper relationship with the Russians -- possible collusion or conspiracy?" Colbert asked.

"No," McCabe replied.