This book analyses the European Parliament’s relations with the national parliaments of the European Union, in terms of political party interactions, institutional arrangements, and two-way influence. Each of the twelve chapters on the member-states of the EU covers three main themes: the links between party-political activity at the European and national levels; the degree of cooperation between the national and the European parliaments; and the extent to which the national legislature is influenced by the EP’s resolutions or other communications.