This article explores how proposals for democratizing the European Union (EU) according to a supranational, contestational model are likely to disrupt its existing political system. The current EU is characterized by a dual system of representation that combines the representation of member states with that of individual citizens. Democratization typically entails enhancing the representation of individuals at the expense of state prerogatives. It is thus possible to make a pertinent analogy with the antebellum United States, which also featured dual representation, and where a great wave of democratization took place following Andrew Jackson's presidency (1829-1837). As the system of representation there became more majoritarian, John C. C...