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Conservative
- American Enterprise Institute
- Center for Immigration Studies
- Center for Security Policy
- Claremont Institute
- Committee on the Present Danger
- Foreign Policy Research Institute
- Heritage Foundation
- Hoover Institution for War, Revolution, and Peace
- Hudson Institute
- Manhattan Institute
- Middle East Forum
- National Center for Policy Analysis
- Pacific Research Institute
- Project for the New American Century
Liberal
- Center on Budget and Policy Priorities
- Center for American Progress
- Center for Economic and Policy Research
- Center for Progressive Reform
- Economic Policy Institute
- Institute for Policy Studies
- Phoenix Group
- Rockridge Institute
- Public Citizen
- The Roosevelt Institution
Centrist
- Aspen Institute
- Atlantic Council of the United States
- Brookings Institution
- Carnegie Endowment for International Peace
- Center for Strategic and International Studies
- Council on Foreign Relations
- Committee for Economic Development
- Information Technology and Innovation Foundation
- New America Foundation
- Progressive Policy Institute
- Resources for the Future
- Henry L. Stimson Center
- RAND
- Urban Institute
- Woodrow Wilson International Center for Scholars
Libertarian
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