Heartland Institute  www.heartland.org Chicago based think tank promoting public policy based on individual liberty, limited government, and free markets.

Heritage Foundation  www.heritage.org A conservative think tank that publishes research on domestic, economic, foreign and defense policy.

Hoover Institution  www.hoover.org A think tank on the campus of Stanford University, dedicated to research in domestic policy and international affairs, committed to generating ideas that define a free society.

Hudson Institute  www.hudson.org A public policy research organization that forecasts trends and develops solutions for governments, businesses and the public. Addresses domestic and international policy issues.