Robert Costa writes: “On May 8, Carla Hayden received an email, one she thought may have been fake. It began simply, ‘Carla,’ and stated: ‘On behalf of President Donald J. Trump, I am writing to inform you that your position as the Librarian of Congress is terminated effective immediately.’ Hayden said there had never been any issues between her and President Trump. Hayden’s firing is seen by many as part of a broader story.”