BETHESDA, Md. (AP) — White House chief of staff Mark Meadows says President Donald Trump went through a “very concerning” period Friday and the next 48 hours will be critical in terms of his care as he battles the coronavirus at a military hospital. The comments came after it was revealed that Trump was administered supplemental oxygen Friday morning at the White House before he was transported to the hospital, although staff insisted he had only mild symptoms. Trump’s doctors, for their part, painted a rosy picture of the president’s health in a press conference at Walter Reed National Military Medical Center. But the briefing by Navy Commander Dr. Sean Conley and other doctors raised more questions than it answered.