ENContrary to some expectations, the Baltic states’ accession to the EU in 2004 was not followed by an improvement in their relations with Russia. Instead, the Baltic states became known as the "troublemakers" of EU-Russia relations. This was commonly explained by their history and national identity, which contributed to an understanding of the Baltic concerns as marginal. The Ukraine crisis brought a reaction of "I told you so" by the Baltic states that for many years had been warning the West about Russia’s expansionist ambitions. This article explores the ideational underpinnings of the gap between the Baltic states’ perceptions of and relations with Russia on the one hand and mainstream views in Europe on the other. It identifies liberal interdependence, democratic peace, and realist geopolitics as key ideas that have framed the EU’s and Baltic states’ perceptions of Russia. In the vein of constructivist foreign policy analysis, these ideational structures are seen to condition the EU’s and Baltic states’ interests and policies vis-à-vis Russia. An analysis of the "Baltic factor" helps to illuminate the contradictions and shortcomings in the EU’s Russia policy and review its ideational basis which is now in need of a strategic rethink. Keywords: EU, Russia, Baltic states, liberalism, geopolitics, constructivism. [From the publication]