Social media play an increasingly important part in the communication strategies of political campaigns by reflecting information about the policy preferences and opinions of political actors and their public followers. In addition, the content of the messages provides rich information about the political issues and the framing of those issues during elections, such as whether contested issues concern Europe or rather extend pre-existing national debates. In this study, we survey the European landscape of social media using tweets originating from and referring to political actors during the 2014 European Parliament election campaign. We describe the language and national distribution of the messages, the relative volume of different types of communications, and the factors that determine the adoption and use of social media by the candidates. We also analyze the dynamics of the volume and content of the communications over the duration of the campaign with reference to both the EU integration dimension of the debate and the prominence of the most visible list-leading candidates. Our findings indicate that the lead candidates and their televised debate had a prominent influence on the volume and content of communications, and that the content and emotional tone of communications more reflects preferences along the EU dimension of political contestation rather than classic national issues relating to left-right differences. In this paper we map the usage of social media in the 2014 European Parliament (EP) election focusing on Twitter, including an analysis of the networks of followers, the usage of national and cross-national hashtags related to the EU, and the types of Twitter communication. We focus on Twitter because it is the most widely adopted platform by politicians for the purposes of personal promotion, diffusing policy positions, mobilization and because it enables a more direct and interactive engagement with the public. Applying sentiment analysis to the text of the Tweets, we also assess various levels of sentiment associated with particular concepts or individuals or countries. Finally, by looking at the associations of message content with external policy measures of candidate parties, we are able to map content and associations within the text to get a picture of the dialogue across the Euro-