Treason is the only crime specifically defined in the U.S. Constitution, and talk of treason has been in the air for the last four years. Carlton F.W. Larson is a professor of constitutional law at University of California at Davis, and the author of On Treason: A Citizen’s Guide to the Law. He joined us to discuss how treason is defined in the U.S., why it’s defined in that particular way, and the U.S.’s checkered past when it comes to actually prosecuting (or not prosecuting) people for treason.