Drifting Further Apart: National Parties and their Electorates on the EU Dimension

Whether parties are representative of their voters over the EU is a key concern in modern European governance. Using European Election Studies data, this article compares opinion congruence between parties and their electorates on the EU dimension in 2004 and 2009 and examines, at the levels of both member states and individual parties, which factors explain variation in opinion congruence between parties and their supporters over integration. The article shows that parties have become less representative of their voters and that they adopt more convergent positions on the EU dimension than their voters. Congruence is higher in smaller parties and in ideologically more extremist left-wing parties. Overall parties are thus drifting further apart from their voters on the EU dimension.