Trump names Mulvaney 'acting' chief of staff

Mick Mulvaney will become the acting White House chief of staff at the end of the year, Donald Trump announced in a tweet on Friday, CNN reportefd.

Mulvaney will not resign as director of the Office of Management and Budget while he is acting White House chief of staff, White House press secretary Sarah Sanders said Friday evening. OMB Deputy Director Russ Vought will handle day-to-day operations for the office, Sanders said in a statement.

A senior administration official said there is "no time limit" for Mulvaney to remain in the top White House post.

Mulvaney could lose the "acting" part of his title if things go well, according to another senior administration official.