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.