WASHINGTON—President Donald Trump added his top adviser and strategist Steve Bannon to the National Security Council while removing the director of national intelligence and the chairman of the Joint Chiefs of Staff, as he signed a trio of executive measures on Saturday.

Trump has picked Mike Flynn, a retired lieutenant general, to lead the NSC. Flynn feuded with the then-head of the Office of the Director of National Intelligence while leading the Defense Intelligence Agency before being removed from the post in 2014. He has also had disagreements with some of Trump’s cabinet picks and raised concerns within various agencies that he’d consolidate power and decision-making in the council. In addition, Flynn has raised eyebrows by staffing the NSC with a number of officials with military backgrounds.

Trump criticized U.S. intelligence agencies on the campaign trail and during his transition to the White House. He concluded that the ODNI, which was formed after the Sept. 11, 2001, attacks and coordinates work between the government’s 16 intelligence agencies, has become bloated and politicized, The Wall Street Journal reported in early January. Trump has selected former Indiana Sen. Dan Coats to head the agency.

Bannon, the architect of Trump’s campaign strategy, is a former media and financial executive.

An expanded version of this report appears at WSJ.com.

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