White House chief strategist Steve Bannon's job may be on the chopping block as President Trump suspects he is behind damaging leaks about West Wing staffers, according to a new report Saturday.

Bannon's West Wing colleagues believe he's behind leaks about national security adviser H.R. McMaster, who has been the target of far-right attacks, Axios reported.

Breitbart News, which Bannon used to run, has targeted McMaster in recent weeks though the top White House aide has told his colleagues he is not behind the attacks.

Trump is also frustrated with Bannon's self-promotion.

The president was not pleased when a book, titled "Devil's Bargain," featured Trump and Bannon as equals on the cover.

The top Trump aide has also been spending less time with the president since John Kelly was hired as Trump's chief of staff.