President Trump informed the media today that his chief of staff John Kelly will leave the White House by the end of the year, and there will likely be an interim replacement. UPDATE: Video Added
This move also makes space for the possibility that President Trump might replace Kirstjen Neilsen as DHS Secretary. Generally speaking it appeared Kelly was protecting Neilsen (previously colleagues). Although, Neilsen has been doing a much better job on border security ever since her demise was previously rumored.