House Democrats are launching an investigation into President Trump’s treatment of the Secret Service during his bout with the coronavirus. Homeland Security Committee Chairman Bennie Thompson, a Mississippi Democrat, accused Trump of disregarding the safety of his protective detail when he left Walter Reed National Military Medical Center for a short drive in his limousine to greet supporters who were outside the facility. Thompson called Trump’s Sunday night trip a “joyride” that risked the health and safety of the agents who had to accompany him on the trip. “So we can know more about how these events have affected the...