Today we dig into a form of American political expression that dates way back in U.S. history, applies to any type of view or opinion, and leaves behind artifacts of campaigns that helped shape who we are: political campaign buttons and memorabilia, powered by the people, events and aspirations the items represented. My guests are Bob Warren—son of Earl Warren, former governor of California and onetime chief justice of the U.S. Supreme Court—and Adam Gottlieb. Both live in Davis, and both are active in American Political Items Collectors, which has its next national convention in Reno July 22-23.

And if you happen to find a certain button from the 1920 Cox/Roosevelt campaign in a box you inherited from your grandparents, your ship has just come in.