Labor union representing 1.6 million employees including health care workers, corrections officers and sanitation workers. Leans Democratic.
Pro-business group whose president is the former head of the New Hampshire Republican Party.
Republican-leaning group formed by Iowa political figures.
A “super PAC” created by Republican Mitt Romney’s former campaign staffers to support his presidential candidacy.
A new “super PAC” focused on returning Democrats to the majority in the House.
A liberal-leaning group founded by former DNC chairman Howard Dean.
A fiscally conservative group founded by J. Joe Ricketts, a businessman who also founded Ameritrade.
A liberal-leaning group founded by a Democratic political strategist and heavily funded by labor unions.
A liberal-leaning group founded by a MoveOn.org strategist, a former labor organizer and an Internet activist.
Lobbying group representing business interests. Leans Right-center.