Some of the arguments in Trump's second impeachment trial get at the core of presidential responsibilities. We examine two of them to clarify the duties of a president during crisis and to understand how free speech applies to the commander in chief.--Virtual event information: Want something fun to do on Presidents’ Day when you can’t leave the house? Join Presidential podcast host Lillian Cunningham for a(free!)'Presidential' trivia night with special guests, fun prizes, plus a demo of how to make Warren Harding’s favorite cocktail. Register here: bit.ly/2YwuEWyRelated reading and episodesOne impeachment is rare. Two is unprecedented.What’s next for Trump?Trump’s lawyers say he was immediately‘horrified’ by the Capitol attack. Here’s what his allies and aides said really happened that day.