Ex-Trump strategist Steve Bannon has stepped down from the right-wing Breitbart News organisation where he built his reputation.
The move comes amid a furore over remarks he reportedly made about US President Donald Trump's son.
He described a meeting in New York with a Russian lawyer during the 2016 presidential election campaign as "treasonous".
He was one of Mr Trump's most trusted - and controversial - aides.
But he left his post last summer after reports of a power struggle among Mr Trump's White House staff.
Mr Bannon had served as executive chairman of Breitbart since 2012.
Breitbart published a statement saying it and Mr Bannon would "work together on a smooth and orderly transition".
It quoted Mr Bannon as 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."
Breitbart CEO Larry Solov was quoted as saying: "Steve is a valued part of our legacy, and we will always be grateful for his contributions, and what he has helped us to accomplish."