In the current debate over national economic policy conservatives have history on their side. Conservatives can point to the Constitution which specifies a limited government based on federalism and they can look to numerous political leaders and scholars who have provided economic policy blueprints that are based upon constitutional principles. During the twentieth century the presidential administrations of Warren G. Harding, Calvin Coolidge, John F. Kennedy and Ronald Reagan all pursued a policy of tax reduction to solve an economic crisis. The best examples that policymakers should emulate are Harding Coolidge and Reagan