PoliticsBarack Obama On Campaign Finance ReformBarack Obama offered fundraisers his blessing today to back a SuperPAC — a move his aides cast as one of necessity. Here the greatest hits of Obama's attacks on the Citizens United ruling, which helped open the cash floodgates.By by Andrew KaczynskiBuzzFeed News ReporterPosted on February 7, 2012, 5:07 amTwitterFacebookLink View this video on YouTube youtube.com View this video on YouTube youtube.com