Color of Change (COC)

Color of Democracy Project (CDP)

Columbia Broadcasting System (CBS)

Columbia Foundation

Columbia School of Journalism (CSJ)

Columbia University (CU)

Columbus Progressive Alliance (aka Progressive Peace Coalition) (CPA/PPC)

Committee for Justice in Palestine (CJP)

Committee in Solidarity with the People of El Salvador (CISPES)

Committees of Correspondence for Democracy and Socialism (CCDS)

Common Cause (CC)

Common Purpose Project (CPP)

CommonDreams (CD)

Commonwealth Information Security Center (CISC)

Communist Party USA (CPUSA)

Compton Foundation

Congressional Black Caucus (CBC)

Congressional Hispanic Caucus (CHC)

Congressional Progressive Caucus (CPC)

Connect US Fund (CUSF)

Constitution Project (CP)

Copenhagen Climate Council (CCC)

Cornell Forum for Justice and Peace (CFJP)

Cornell University Peace Studies Program (PSP)

Correct The Record (CTR)