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• Acton Institute for the Study of Religion and Liberty

• American Council on Capital Formation (ACCF)

• American Council on Science and Health (ACSH)

• American Enterprise Institute (AEI)

• American Legislative Exchange Council (ALEC)

• American Spectator Foundation

• Americans for Prosperity Foundation (AFP)

• Americans for Tax Reform (ATR)

• Atlas Economic Research Foundation

• Ayn Rand Institute (ARI)

• Capital Research Center (CRC)

• Cato Institute

• Center for Freedom & Prosperity Foundation

• Center for Independent Thought: Stossel in the Classroom

• Center for the Study of Carbon Dioxide and Global Change

• Center for the Study of Market Processes

• Citizens for a Sound Economy (now FreedomWorks)

• Collegians For A Constructive Tomorrow (CFACT Campus)

• Commonwealth Foundation for Public Policy Alternatives

• Competitive Enterprise Institute (CEI)

• Council for National Policy

• Environmental Literacy Council

• Federalist Society for Law and Public Policy Studies

• Foundation for Economic Education (FEE)

• Foundation for Research on Economics and the Environment (FREE)

• Fraser Institute

• Frontiers of Freedom

• George C. Marshall Institute

• Goldwater Institute

• Heartland Institute (HI)

• The Heritage Foundation

• Independence Institute

• Independent Institute

• Independent Women’s Forum (IWF)

• Institute for Energy Research (IER) & American Energy Alliance (AEA)

• Institute for Humane Studies (IHS)

• James Madison Institute (JMI)

• John Locke Foundation (JLF)

• Mackinac Center for Public Policy

• The Manhattan Institute for Policy Research

• Media Research Center (MRC)

• Mercatus Center

• National Center for Policy Analysis (NCPA)

• National Review Institute

• National Taxpayers Union Foundation (NTUF)

• Pacific Research Institute for Public Policy (PRIPP)

• Property and Environment Research Center (PERC)

• The Reason Foundation

• State Policy Network (SPN)

• Students for Liberty

• Tax Foundation

• Texas Public Policy Foundation (TPPF)

• Washington Legal Foundation (WLF)