Donald Trump December 14, 2018 3:07 pm Trump Names Mick Mulvaney Acting Chief of Staff President Donald Trump announced on twitter Friday that Mick Mulvaney will take over as acting chief of staff, replacing John Kelly. US & World Videos 1:36 Arizona Senate repeals 1864 abortion ban 1:40 Democrats say Big Oil misled public for decades about climate change 5:44 May Day demonstrations, Gaza war protests continue across Bay Area 3:27 May Day demonstrations planned, Gaza war protests continue across Bay Area 2:27 Junk fee law bans restaurant surcharges