Republican Party / Institute for Legislative Action / United States Senate / Sunlight Foundation / Republican Senatorial Committee / American Fed / League of Conservation Voters / Spending Action Fund / Brennan Center / U.S. Chamber of Commerce / Democratic Senatorial Campaign Committee / NEA Advocacy Fund / Freedom Partners Action Fund / Competitive Senate Races party / Conservation Voters Victory Fund / BRENNAN CENTER FOR JUSTICE|2 / America Political Victory Fund / Senate / National Education Association / /