This document discusses how political campaigns have increasingly utilized social media platforms like Facebook, Twitter, and custom polling applications. It provides examples of how Barack Obama successfully engaged voters through social media in his 2008 and 2012 presidential campaigns. His campaigns emphasized voter inclusion, real-time conversation, and grassroots organizing online at little cost. Looking forward, the document discusses new trends like using Twitter to influence political debates and the rise of platforms like Americans Elect that aim to nominate nonpartisan presidential candidates through online voter input.