Conservative-leaning group founded with help from Karl Rove and former RNC Chairman Ed Gillespie.
Liberal-leaning group founded by ex-White House staffers Bill Burton and Sean Sweeney to counter American Crossroads/Crossroads GPS.
Founded by a former Republican senator and a former GOP House aide. Leans GOP/Right-center.
Large federation of labor unions is strongly Democratic.
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.