Much of the discussion about the provisions on national parliaments in the Lisbon Treaty has concerned the potential for increasing politicization and parliamentarization of European Union (EU) politics. However, a more immediate change can be expected at the domestic level, as national parliaments adapt to make effective use of these new powers. In order to approach this question systematically, this article develops a framework for the analysis of the Europeanization of national parliaments that starts from the recognition that the Lisbon changes involve an inherent dynamic towards increasing transnational interaction among parliaments as well as pressures to rely more on technical expertise and administrative support in their internal wo...