In 2008, nearly 40% of adults in the United States communicated with others about politics using the Internet: 11% posted political content on a blog, 20% shared their political views on twitter, and 33% posted political content on social networking sites such as Facebook and LinkedIn (Pew Center, 2008). Has this phenomenon improved informed public discourse? Has it shattered the electorate? The evidence suggests both have happened to some degree.
This new article was just posted on the online Review, check the rest of it out: http://www9.georgetown.edu/grad/gppi/GPPIReview/index.cfm?tpl=article&articleID=102