SEIU
Largest union in the US, primarily representing workers in health care, property services, and government
Public Citizen
non-profit, liberal/progressive consumer rights advocacy group and think tank based in Washington, D.C
Oxfam America
United States branch dedicated to finding long-term solutions to poverty, hunger, and social injustice around the world.
NAACP
African-American civil rights organization in the United States, formed in 1909
League of Conservation Voters
American environmental advocacy group