In a statement, Bannon commended his team, saying, "I'm proud of what the Breitbart team has accomplished in so short a period of time in building out a world-class news platform".
The author of a tell-all book that paints a poor picture of President Donald Trump and the early days of his administration said Monday he will not release his notes or interview tapes to prove his quotes and stories are accurate.
"It's tragic and unfortunate that Steve would make these grotesque comments so out of touch with reality and obviously so vindictive", White House senior policy adviser Stephen Miller said on CNN's "State of the Union" program.
Those remarks prompted the president to declare that Bannon had "lost his mind".
Among other topics, the book explores tensions between Bannon and Trump's son-in-law, Jared Kushner, over Israel.
A brief statement released on the Breitbart News Network website on Tuesday confirmed that Bannon had stepped down from the role and that he will work together with Breitbart "on a smooth and orderly transition".
The 'schedules' raise issues about his fitness for office as he struggles with the fallout from Michael Wolff's Fire and Fury: Inside the Trump White House. Loss of his media perch could jeopardize Bannon's campaign to remake the Republican Party by fielding Trump-allied candidates to challenge incumbent lawmakers.
"This is an unusual situation", Phillips said. "You can't say Steve's not a smart guy, you can't say that Steve's not a good writer, you can't say that after Andrew Breitbart's death he didn't help raise the profile of Breitbart -- not a super profitable place, but certainly had a very high profile in the last election".
Bannon's departure from Breitbart came as a shock to some of his allies.
While Trump complained about press leaks, "the biggest leaker was Donald Trump", Wolff told Katy Tur in an MSNBC segment.
After further noting that there is one paragraph in the book that contains three errors, the CNN anchor concluded by stating how this places readers in a tough position. Today Breitbart is known as the platform for the alt-right.