Who started the tradition of delivering a State of the Union address in person?

Are there assigned seats for Members of Congress?

Why are the people in the President's box referred to as the "Skutniks"?

The Post's Ed O'Keefe, who you will be seeing more of in this space in the days and weeks to come, answers all of those questions and more in the latest edition of his "Edsplainers" series. It's great stuff.