Populism is now a major global force, challenging our vision of constitutionalism but not upending it completely. By reasserting the importance of a political community, populism in our era provides an important corrective to globalism. Drawing on a forthcoming book with Aziz Huq, this paper argues that populism can fit in the framework of liberal constitutional democracy, on which it ultimately depends, but emphasizes the majoritarian elements over the liberal ones. The gravest challenge of populism is to the bureaucratic rule of law, and the outcome of this conflict will determine whether constitutional democracy lives or dies in any particular context.