White House strategist Steve Bannon supported President Trump's decision to appoint former Marine Gen. John Kelly as the chief of staff because the populist former Breitbart executive feared the president would choose a Democrat for the position instead, according to a report Monday.

Politico reported Bannon worried Trump would replace Reince Priebus with National Economic Council Director Gary Cohn.

Bannon viewed Kelly's appointment as a loss for the "White House Democrats," Politico said, meaning Cohn, Jared Kushner, and Ivanka Trump.

Cohn is a Democrat and former president of Goldman Sachs.

Kelly, who was Trump's secretary of the Department of Homeland Security, had a notable first day on the job Monday.

The combative White House communications director Anthony Scaramucci was removed from his position less than 10 days after Trump hired him.

Multiple reports said Kelly asked for Scaramucci to be removed as a way to impose full authority over his staff.