Oxford Studies in Digital Politics Online social media are changing the face of politics in the United States. Beginning with a strong theoretical foundation grounded in political, communications and psychology literature, "Tweeting to Power" examines the effect of online social media on how people come to learn, understand and engage in politics. Gainous and Wagner propose that platforms such as Facebook and Twitter offer the opportunity for a new information flow that is no longer being structured and limited by the popular media. Television and newspapers, which were traditionally the sole or primary gatekeeper, can no longer limit or govern what information is exchanged. By lowering the cost of both supplying the information and obtaining it, social networking applications have recreated how, when and where people are informed. To establish this premise, Gainous and Wagner analyze multiple datasets, quantitative and qualitative, exploring and measuring the use of social media by voters and citizens as...