The White House plans to transfer Lt. Col. Alexander S. Vindman, whose testimony in the House impeachment hearings infuriated President Trump and his allies, out of the National Security Council staff as early as Friday, two senior administration officials said. It was not immediately clear where he would next be sent within the Defense Department, one administration official said, but Colonel Vindman is on active duty in the military. The action comes just days after Mr. Trump was acquitted in a Senate impeachment trial that turned in part on the testimony of Colonel Vindman and other administration officials who described...