Cato Institute MacIver Institute Civitas Institute Heartland Institute Liberty Institute The Commonwealth Institute Public employee unions Amalgamated Transit Union Culinary Workers Union More Perfect Union National Taxpayers Union Competitive Enterprise Institute Colorado Health Institute Illinois Policy Institute Illinois Family Institute American Postal Workers Union Texas State Employees Union American Petroleum Institute Cascade Policy Institute Institute for Energy Research American Civil Liberties Union Institute for Women's Policy Research Wisconsin Institute for Law & Liberty American Civil Liberties Union of Florida Ocean State Policy Research Institute The Ronald Reagan Presidential Foundation and Institute American Civil Liberties Union of New Jersey United Association’s Union Plumbers and Pipefitters Vote! PAC
