This Essay draws on recent academic definitions of populism and recent examples of its use in order to show that there is an affinity between populism and widespread constitutional change. It argues that populists use constitutional change to carry out three functions: deconstructing the old institutional order, developing a substantive project rooted in a critique of that order, and consolidating power in the hands of populists. Thus, access to the tools of constitutional change may accentuate both the promise of populism as a corrective to stagnating liberal democracies and the threat that it poses to those constitutional orders. I also argue that there is a trajectory to populist constitutionalism: populist constitutions begin by emphasi...