Approximately 70 percent of Trump’s White House staff were working in D.C. before the start of the administration, according to a Newsweek analysis of White House employees and detailees, staff who are on loan from other federal agencies. Using LinkedIn, media reports, information released by the White House and other publicly available data, Newsweek was able to determine with near certainty the identities of 338 of the 377 employees listed in an annual report on White House personnel released last week to Congress.