This comment explores how experimentalist governance is connected to wider constitutional questions and makes two claims. First, there are good reasons to believe that experimentalist governance can only flourish in a world where the precepts of liberal democratic constitutionalism have been widely accepted and institutionalized. Experimentalist governance is part and parcel of the world of liberal democratic constitutionalism. Second, it is not only governance in Europe that can be described in experimentalist terms. The concept is also useful to describe the dynamics of European constitutionalism.