Sierra Club
Environmental advocacy non-profit
Working Families Party
Progressive grassroots U.S. party
State Voices
Works to connect state-based advocacy groups to one another and to voter information
Roosevelt Institute
Think tank carrying forward the legacy and values of Franklin and Eleanor Roosevelt
re:power
U.S. grassroots organizing group
ProgressNow
Grassroots 501(c)(4) progressive organization - formerly the Rocky Mountain Progressive Network
People's Action
U.S. progressive advocacy and political organization