COOPER: Former National Security Advisor John Bolton's new book and what it says about U.S. Attorney General Bill Barr may pose new problems for the nation's top prosecutor. It might pull him into the impeachment trial that he's been able to avoid for months now. Evan Perez, our CNN senior justice correspondent, is here with me reporting on that. Evan, this has to do with credibility?</s>EVAN PEREZ, CNN SENIOR JUSTICE CORRESPONDENT: That's right, Anderson. Everyone knows John Bolton wants to be part of this impeachment trial and this controversy surrounding the president. Bill Barr decidedly trying to avoid it. He's been successful so far. But the accounts of what Bolton says were conversations with the attorney general while the two of them were still in the Trump administration could change that. Bolton says he and Barr both shared concerns about the president sort of promising favors to the leaders of Turkey and China. They apparently had a conversation in the days after the Ukraine call on July 25th, in which Bolton says he warned Barr his name had come up on that call. That changes -- that's a different timeline from what the Justice Department says when Barr learned first about this call back in August. We'll see whether or not Bolton becomes a witness in this trial. Certainly, it will be his word against the attorney general. Because the Justice Department is pushing back hard on what Bolton said, his accounts of these conversations the two men had. I should mention, these are men that go back -- their friends from back in the Reagan administration, so it's a remarkable turn of events for the two of them.</s>COOPER: Fascinating. Evan Perez, thanks very much. As we await the question-and-answer phase of the impeachment trial, the president says he hires the best people. There's a pattern, though, of the president always turning on those very people. Next.
Bolton Book Revelations Could Pull A.G. Barr into Impeachment Trial