<span style="color: #222222;">US President Donald Trump has named budget director Mick Mulvaney as the acting chief of staff, a week after he announced John Kelly's scheduled departure.</span><br />'' <br />'' <span style="color: #222222;">In a tweet, Trump said he look forward to working with Mulvaney.</span><br />'' <br />'' <span style="color: #222222;">The latest announcement came as Trump spent almost a week considering a nominee to fill the vacancy left by Kelly, a retired U.S. Marine Corps general.</span><br />''  <br />