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Scorecard for the top 10 outside spenders

Rank Group Wins-Losses Total spent
1 Restore Our Future 0-1 $143 million
2 American Crossroads 3-10 $105 million
3 Crossroads GPS 7-17 $71 million
4 Priorities USA Action 1-0 $67 million
5 Majority PAC 14-3 $37 million
6 Americans for Prosperity 1-2 $37 million
7 U.S. Chamber of Commerce 7-33 $36 million
8 House Majority PAC 40-31 $31 million
9 Service Employees International Union 52-29 $30 million
10 American Future Fund 5-17 $25 million

Source/Methodology: Center for Public Integrity analysis of Federal Election Commission data collected by the Center for Responsive Politics and the Sunlight Foundation. Total spending and win-loss records calculated based on all 2011-2012 election cycle activity, including the November general election, primaries and special elections.