President Trump on Friday tweeted that he has named Mick Mulvaney as acting White House chief of staff. Mulvaney serves as director of the Office of Management and Budget.
….I look forward to working with him in this new capacity as we continue to MAKE AMERICA GREAT AGAIN! John will be staying until the end of the year. He is a GREAT PATRIOT and I want to personally thank him for his service!
— Donald J. Trump (@realDonaldTrump) December 14, 2018