News Trump’s acting chief of staff Mick Mulvaney is out. Mark Meadows will take on role March 6, 2020 David Jackson and John Fritze, USA TODAY Comments Off on Trump’s acting chief of staff Mick Mulvaney is out. Mark Meadows will take on role Mark Meadows, a North Carolina lawmaker, will become Donald Trump's latest White House chief of staff, replacing Mick Mulvaney.