How close has America actually come to falling apart? Not in the way politicians throw the word "crisis" around today, but in real, documented, military-was-deployed, states-were-leaving moments. In this Pop Quiz episode, Jon walks through the moments that nearly broke the republic, what these moments had in common, and the one thread that kept pulling us back from the edge each time.

Join us every Thursday for pop quizzes and Sketches in History!