In this Oct. 4, 1956, illustration, Aaron Burr, who served as Thomas Jefferson's vice president, is shown. Burr was indicted for murder in the duel slaying of Alexander Hamilton and later for treason in a plot to seize the new Louisiana Territory. Sedition and treason cases have been rare in U.S. history. But after after Trump supporters stormed Capitol Hill on Jan. 6, many described their behavior as seditious, even treasonous. (AP Photo)