Democratic-leaning labor union representing 2.1 million health care, government and property management workers.
A liberal super PAC that conducts opposition research to aid Democratic candidates and organizations.
A 501(c)(4) founded by a former Republican senator and a longtime GOP fundraiser. It focuses on keeping the House in Republican control.
Affiliated liberal groups founded by a Democratic political strategist and heavily funded by labor unions.
A liberal super PAC founded by San Francisco billionaire and climate-change activist Tom Steyer that focuses on environmental issues.