- American Enterprise Institute for Public Policy Research (AEI)
- Bill of Rights Institute
- Buckeye Institute
- Cascade Policy Institute
- Cato Institute
- Commonwealth Foundation
- Competitive Enterprise Institute
- Empire Center for New York State Policy
- Heritage Foundation
- Independent Institute
- John Locke Foundation
- Lincoln Institute
- Mackinac Center for Public Policy
- Manhattan Institute
- Nevada Policy Research Institute
- Oklahoma Council of Public Affairs
- Pennsylvania Family Institute
- Pennsylvania Leadership Conference
- Pennsylvania Manufacturers’ Association
- PERC-The Center for Free Market Environmentalism
- Reason Foundation
- Susquehanna Valley Center
- Texas Public Policy Foundation
- The Heartland Institute
- The James Madison Institute for Public Policy Studies
- Grove City Center for Vision and Values