The Brookings Institution. February 14, 2012.

In 2008, candidate Barack Obama pioneered several innovative applications of digital technology. With the help of the Internet, he raised $750 million. He made use of social media platforms such as Facebook and MySpace to identify and communicate with supporters around the country. Four years later, smartphones and handheld devices have proliferated and now outnumber desktop computers. Candidates, voters, activists, and reporters are using these vehicles for public outreach, fundraising, field organization, political persuasion, media coverage, and government accountability. Unlike 2008, where text messaging was the dominant feature of mobile campaign outreach, this year there has been a proliferation of mobile ads, video, web links, and apps. [Note: contains copyrighted material].

http://www.brookings.edu/~/media/Files/rc/papers/2012/0214_campaign_tech_west/0214_campaign_tech_west.pdf [PDF format, 10 pages].