President Donald Trump’s chief strategist, Stephen K. Bannon, died Thursday, according to a statement from the White House.
Bannon was 85.
The White House did not immediately provide a cause of death.
Bannon joined the White Trump campaign in late 2016, a year after his father, Richard, ran for the House of Representatives from Virginia.
The elder Bannon, who was a prominent conservative figure in the United States, had previously worked as an executive at a financial services company, and was a leading figure in Trump’s campaign and transition.
Bannon became Trump’s top strategist in February, a position he held until late June, when he departed for the private sector.
A spokesman for the White Nationalist Movement, a white nationalist organization founded by Bannon, did not respond to a request for comment on the cause of Bannon’s death.
The statement from White House spokesman Sean Spicer said Bannon was a “strong, principled and respected figure in our country’s conservative movement” who “worked tirelessly to advance the agenda of the President and the Republican Party.”
“He will be greatly missed by his wife, Rebekah, his daughters, and many friends,” Spicer said.
The move to part ways comes just days after the White Houses senior political strategist, Katie Walsh, resigned from the administration over concerns about Bannon’s communications strategy, Politico reported.
Bannon’s role in the Trump campaign and the transition has come under fire for its lack of transparency and ideological purity.
His son, Stephen, was a top aide to Trump during the campaign, and Bannon has previously praised him.
Bannon has been a vocal critic of Trump’s policies, including the withdrawal of U.S. troops from the country, and the president’s decision to keep Bannon in his position.
He was also a vocal Trump critic during the election.
During the 2016 presidential campaign, Bannon helped Trump’s Republican National Committee launch a political action committee and launched the Breitbart News Network, which Bannon describes as a platform for “white ethno-nationalism, populism, and populism for the alt-right.”