Brennan Center for Justice
at New York University School of Law
Demos
liberal think tank based in New York City
Campaign Legal Center
Washington, D.C.-based nonprofit focuses on campaign finance issues in the courts and before the FEC
Public Citizen
non-profit, liberal/progressive consumer rights advocacy group and think tank based in Washington, D.C
OpenSecrets
Created in 2021 through the merger of the Center for Responsive Politics and the National Institute on Money in Politics