The article examines the compatibility of agonistic democracy and populism as well as their relationship to the idea of constitutionalism. The first part shows that Chantal Mouffe’s recent attempts to reconcile her normative approach of an agonistic pluralism with a populist style of politics are not fully convincing. Although there are undeniable commonalities between an agonistic and a populist understanding of politics – the appreciation of conflict, the rejection of moralistic and juridical modes of conflict resolution etc. – the populist (...) mode of the construction of the people (and the denunciation of political opponents as enemies of the people) risks impeding the transformation of antagonistic into agonistic modes of political contest. The tensions between agonism and populism are especially evident in matters of constitutionalism. This topic is examined in the second part of the article, which provides some ideas for reducing the normative and institutional blind spots of contemporary theories of agonistic democracy. It focuses on elementary principles for an agonistic concept of democratic constitutionalism that differs from the populist view of the relationship between politics and law, especially in respect of its interpretation of the concept of ‘resistibility’ of legal norms. (shrink)