TOP SPENDING PAC’S AND DARK MONEY GROUPS
Other super PACs assumed the role that parties might normally play in tightly contested elections, only now they could solicit unlimited sums from wealthy donors. Senate Majority PAC and Senate Leadership Fund launched with the blessing of Democrat and Republican leadership respectively.
On the House side, party leaders helped launch the liberal House Majority PAC and the conservative Congressional Leadership PAC.
Citizens United suddenly and dramatically increased the power of dark money groups, namely nonprofit groups that are not required to disclose their donors — to directly influence federal elections. These secretive groups spent $963 million on elections over the last decade without informing voters who paid for their ads.