A nice suite of studies on the role that social media are playing in U.S. politics can be found at the following links:
- Social Media and Voting: http://pewinternet.org/Reports/2012/Social-Vote-2012.aspx
- Social Media and Political Engagement: http://pewinternet.org/Reports/2012/Political-engagement.aspx
- Politics on Social Networking Sites: http://pewinternet.org/Topics/Activities-and-Pursuits/Politics.aspx?typeFilter=5
For a full overview of Pew Internet’s research on the internet and politics, see: http://pewinternet.org/Topics/Activities-and-Pursuits/Politics.aspx?typeFilter=5