Speaker of the House Nancy Pelosi has delivered Articles of Impeachment of Donald J. Trump and the appointment of Impeachment Managers to the U.S. Senate on January 25. The Senate cannot legally hold a trial on impeachment of a President or other official who has already left office. As we will watch, the Senate has extensive, long-established procedures -- but only as its own rules. The Senate must convene the next day at 1:00 P.M. But the Senate typically schedules the actual trial for later. Chuck Schumer says the trial will start February 8. Senate rules require a trial, whereas...