During the 2012 United States election the prevalence of political campaigning permeated throughout social network sites. It was not uncommon for political candidates on all levels of government to integrate an array of social network sites in their campaign communication strategies. Despite their vast use in elections and the recognition of their significance in the media, there is a lack of empirical research that examines the complex relationship between political campaigns and social network sites. The present research responds to this gap in the literature as it seeks to understand how two congressional campaigns employed social network sites to facilitate campaign communication. Following the collection of data from qualitative interviews with campaign staff, analysis revealed that social network sites were used to improve the effectiveness of their campaigns’ messages, to generate online engagement and offline activism, and to improve understanding the needs and opinions of the electorate.