Curb EU enthusiasm: how politicisation shapes bureaucratic responsiveness

International institutions are often challenged for being detached from the citizens. Focusing on the European Union, this article studies whether this is the case and, if so, when the European Commission responds to public opinion when pursuing policy integration. It argues that the Commission has legitimacy incentives encouraging it to be responsive but politicisation can suppress responsiveness by transmitting competing demands on the Commission from the member states' citizens. To test these arguments, the contribution applied automated text analysis to estimate the European Union (EU) authority expansion entailed in the Commission's legislative proposals between 2009 and 2019 and analysed its correspondence with public preferences over EU policy action across the EU states, measured using the Eurobarometer. The results lend support to the hypotheses and suggest that politicisation can undermine the responsiveness of international institutions.