Former FBI Deputy Director Andrew McCabe says there were meetings at the Justice Department in the days after President Trump fired FBI Director James Comey over whether to invoke the 25th amendment against Trump.

According to McCabe's new book and his interview with Scott Pelley of '60 Minutes," department officials surmised which cabinet officials would support Trump and which would deem him unfit for office. McCabe also says they discussed having Deputy Attorney General Rod Rosenstein wear a wire when meeting with Trump.

Rosenstein has pushed back vigorously if not specifically. He says there was no serious discussion of wearing a wire and that he sees no reason to invoke the 25th amendment against Trump.

So who, if either of them, is telling the truth? What does it say about the Justice Department at the time of Comey's firing? And what does it tell us about the larger Trump investigation?

We discuss all of those questions and more with former federal prosecutor Andrew C. McCarthy, who is now a contributing editor and columnist at National Review Online and a Fox News Channel contributor. McCarthy also offers his reaction to Republicans and Democrats on the Senate Intelligence Committee concluding there is no direct evidence of collusion between the Trump campaign and Russia in the 2016 campaign.