- National Trust for Historic Preservation (National Trust)
- National Urban League (NUL)
- National Wildlife Federation (NWF)
- National Women's Political Caucus (NWPC)
- Operation Rescue National (ORN)
- Organization of Chinese Americans (OCA)
- Peace Action
- People for the American Way (PFAW)
- People for the Ethical Treatment of Animals (PETA)
- Planned Parenthood Federation of America (PPFA)
- Project Vote Smart (PVS)
- Rainbow/PUSH Coalition (RPC)
- The Rutherford Institute (TRI)
- Service Employees International Union (SEIU)
- The Sierra Club
- Transport Workers Union of America (TWU)
- U.S. English
- United Automobile, Aerospace and Agricultural Implement Workers of America (UAW)
- United Farm Workers of America (UFW)
- United Food and Commercial Workers International Union (UFCW)
- United Mine Workers of America (UMWA)
- United Nations Association of the USA (UNA-USA)
- United States Chamber of Commerce
- United States Public Interest Research Group (U.S.PIRG)
- United Steelworkers of America (USWA)
- United Transportation Union (UTU)
- Veterans of Foreign Wars of the United States (VFW)
- The Wilderness Society (TWS)
- The WISH List
- World Wildlife Fund (WWF)
