Especially since the Maastricht Treaty, national trade unions have increasingly started to use a broader European agenda to lobby their interest at the national level (Visser 2004) and embraced a European identity by trying to modify the neoliberal priorities of the EU in favor of the workers. Trade unions’ backing of the EU remains at a considerably high level although their members’ trust in the elite project of European integration has been shaken amid the crisis.
In this paper, we measured Euroscepticism using data from the Eurobarometer and the Data Base on Institutional Characteristics of Trade Unions complemented with semi-structured interviews with trade unions’ officers. Using four case studies: UK, Denmark, Finland and Spain, our study reveals that while on average countries with higher union membership density exhibit a somewhat lower degree of Euroscepticism, the picture across the European countries is not homogeneous.