Do parties respond to voters' preferences on European integration in elections to the European Parliament? In this article, we argue that political parties do respond to voters' Euroskeptic attitudes, but that party type conditions responsiveness. In particular, we posit that larger parties are more responsive and that governing parties are less responsive to aggregate Euroskepticism. To test our theoretical expectations, we use data from the Euromanifestos Project and European Election Study from 1989 to 2009 for 252 parties across 26 European Union Member States. Our findings have important implications for understanding democratic representation in the European Union and the second-order nature of elections to the European Parliament.