The research project examines the impact of Russia-related votes on the voting alignments in the European Parliament (EP) and the voting behaviour of the Members of the EP (MEPs). Although economically very intense, the relations between the European Union (EU) and Russia are still marked by mutual mistrust and ambivalence. On the other hand, EU-Russia relations present an evident divisive potential, given Member States' (MS) different stances towards Moscow, primarily reflecting, but not limited to, the East-West divide. This project proposes to analyse the change in MEPs' legislative behaviour when voting on Russia and identify the factors that determine the changes, both in terms of individual MEPs and national delegations. The two levels of analysis will tell us more about the relative weight of MEPs' individual attitudes and nationally-driven behaviours on potentially salient votes. It is assumed that, given the key national relevance of MS' relations with Russia, national politics is likely to affect MEPs' voting decisions and reduce the weight of individual attitudes on their voting choices. Practically the analysis will empirically compare MEPs' voting alignments on Russia-related votes with the full universe of votes held in the 6th and 7th EP, using the NOMINATE algorithm. The votes on Russia will be then categorized in terms of polarization and political salience to assess the impact of MEPs' attitudes and MS' stances towards Moscow on legislators' voting choices. By connecting the field of international relations with the European parliamentary studies, the project fills a relevant gap in the literature, given the lack of studies on EU-Russia relations adopting an EP perspective. Given the EP’s increased powers and its growing activism within external relations, this neglect seems no longer justified. Moreover, the EP's multinational and politically diverse nature facilitates cross-country comparisons and grants a satisfactory degree of generalizability.