Special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE plans to question former White House chief strategist Stephen Bannon about high-profile Trump administration firings, including the ouster of former FBI Director James Comey James Brien ComeyBook: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa Graham: Comey to testify about FBI's Russia probe, Mueller declined invitation MORE, CNN reported Wednesday.

Mueller wants to talk with Bannon about the firings of Comey, former national security adviser Michael Flynn and former acting Attorney General Sally Yates Sally Caroline YatesButtigieg, former officials added to Biden's transition team The Hill's 12:30 Report: Delegates stage state-centric videos for the roll call Trump fires back at Yates for convention speech: 'Terrible AG' MORE, CNN reported.

Mueller is reportedly expected to speak with Bannon, who left his White House role last summer, by the end of the month.

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Bannon has called President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE’s decision to fire Comey the biggest mistake in “modern political history,” arguing it led to Mueller appointment to investigate Russian election meddling, including potential ties between the Trump campaign and Moscow.

He sat down earlier this month with the House Intelligence Committee for its probe into Russian meddling in the 2016 presidential election. However, he frustrated lawmakers by refusing to answer questions about his time in the Trump administration, citing executive privilege.

CNN reported Wednesday that Bannon will not be able to use the same tactic with Mueller.

Mueller’s probe has thus far led to two indictments and two guilty pleas.

Former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE and his former business associate, Richard Gates, were charged with money laundering and tax fraud, among other charges mostly related to the pair's work for a pro-Russia political party in Ukraine.

Flynn and former Trump campaign adviser George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE pleaded guilty to lying to the FBI.

Mueller subpoenaed Bannon earlier this month as part of his investigation.

Bannon has fallen out of favor with Trump after he was quoted extensively in Michael Wolff’s book “Fire and Fury: Inside the Trump White House.”

In the book, Bannon criticizes Trump and his family, calling Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE’s meeting with a Russian lawyer at Trump Tower in 2016 “treasonous” and “unpatriotic.”

Trump issued a blistering rebuke of Bannon in response, saying he “lost his mind” when he left his White House job.