Think Progress Justice
By Rebecca Leber on Aug 14, 2012 at 3:50 pm
Karl Rove’s Crossroads GPS (an affiliate of the super PAC American Crossroads) and the Koch brothers’ Americans For Prosperity have spent more on TV ads than every super PAC combined, according to a ProPublica analysis of CMAG data. Unlike super PACs, these groups do not have to disclose donors. That has allowed a handful of unknown billionaires — like Sheldon Adelson and the Kochs — to funnel millions into attack ads through outside groups.