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

“He most recently served as the Office of Management and Budget director. While Mulvaney was named as an acting chief of staff, he will step down from his role as OMB director, a White House official said.

“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.”

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