This book focuses on the interrelatedness of social movements and elections and develops the theoretical dimension of movement-voter interaction. It posits that social movements engage in communicative tactics during elections to highlight specific issues and to convey ideas, values and beliefs to the voter. Applying methodological tools from political discourse analysis, the book considers the breadth of on- and offline tactics employed by the UK movement groups The People's Assembly Against Austerity and Extinction Rebellion in the 2015, 2017 and 2019 general elections. The book argues the case for social movement-voter interaction as a key aspect of social movement and political communication research.