Constitutional Politics in the European Union may be thought of as a double oxymoron. The first paradox arises from the association of politics with constitutionalism, for constitutionalism is often understood as a (legal) limit to the means and ends of politics. The second apparent contradiction lies in linking the idea of the modern constitution – an institutional form developed in conjunction with the nation-state -with an organization, the EU, which is at best supra- or post-national. Obviously, in writing on constitutional politics as an aspect of European integration, we reject such stylized views. Nonetheless, both views stand to remind us that the very subject matter of this chapter is open to contestation. The first section of the chapter will therefore address the ...