Steve Bannon, Donald Trump's ex-chief strategist, 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 President Donald Trump's son.
He described a meeting Donald Trump Jr held in New York with a Russian lawyer during the 2016 presidential election campaign as "treasonous".
He was one of Trump's most trusted - and controversial - aides.
But he left his post last summer after reports of a power struggle among Trump's White House staff.