Donald Trump December 14, 2018 6:07 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 10:42 Multiple people arrested as police clear campus encampments 2:51 Sunny Saturday morning followed by clouds in New England 1:40 Heavy police presence near on-campus protests 5:49 Kelly Clarkson hilariously attempts handmade pasta with chef Evan Funke 1:36 O.J. Simpson's cause of death revealed