Heated discussions over the release of White House ex-advisor John Bolton's book are at full blast.

The US President Donald Trump said in an interview with CBN that 'Bolton's got a big problem'.

"I think John Bolton's got a big problem. Plus, he's not going to be able to keep his money. I don't think there's a chance that he's going to be able to keep this money. So we'll see what happens," Trump told CBN.

John Bolton's book 'The Room Where It Happened' is set to be released on Tuesday this week.

According to the Justice Department, there were classified items that remained in the book, including some as "exceptionally restricted."

Trump had earlier said that every conversation with him is "highly classified."

Federal prosecutors are weighing whether to criminally charge John Bolton with disclosing classified information or not.