July 6 (Bloomberg) — Sam Graham-Felsen, former chief blogger for President Barack Obama’s 2008 campaign, talks about the role of social media in politics and the outlook for fundraising in the 2012 presidential election. Obama will take questions today in what White House officials are calling his first Twitter town hall, complete with a “Tweetup.” Graham-Felson speaks on Bloomberg Television’s “InBusiness With Margaret Brennan.” (Source: Bloomberg)