In order to help close the financial gap between his campaign and its republican contenders, the Obama campaign reversed its long-standing opposition to super PACs. The reversal marks the beginning of a new phase in the presidential race both in terms of strategy and ideology, and is yet another sign of the huge role that these largely unregulated fundraising groups will play in the 2012 election cycle. Joe Hagan is contributing editor for New York Magazine, and recently wrote the article, “The Coming Tsunami of Slime.”