The party politics of the EU's relations with the USA: evidence from the European Parliament

The USA is one of the "geopolitical others" of the European Union. Different geopolitical worldviews and normative commitments, therefore, often clash when relations with the USA are at stake. Whereas most analyses focus on differences between EU member states and their foreign policy traditions, this paper examines to what extent and in what way politicisation is driven by party politics by studying roll call votes in the European Parliament (EP) between 2004 and 2019. We find evidence that transatlantic relations have become more politicised. We show that voting behaviour is influenced first and foremost by MEPs' affiliation with one of the political groups, not by their nationality. Furthermore, we demonstrate that support for the USA follows a bell-curve where centrist political groups are most supportive of the USA and political groups at the far ends of the left/right spectrum are most critical. Policies towards the USA are also related to the "new politics" dimension that pits cosmopolitans against nationalists, but the correlation is weaker than the one with the traditional left/right dimension. We examine the arguments brought forward in support for political groups' voting behaviour by analysing the parliamentary debates preceding key votes on EU-US relations.