Encyclopedias, Almanacs, Transcripts, and Maps
- Radical Populist Constitutional Interpretation
- Radio Direction Finding Equipment
- Radio Frequency (RF) Weapons
- Radiological Emergency Response Plan, United States Federal
- Railroad Control Act 40 Stat. 451 (1918)
- Railroad Retirement Act 48 Stat. 1283 (1934)
- Railroad Retirement Board v. Alton Railway Company 295 U.S. 330 (1935)
- Railway Express Agency v. New York 336 U.S. 106 (1949)
- Randolph, Edmund (1753–1813)
- Randolph, John (1773–1833)
- Ratification of Constitutional Amendments
- Ratification of the Constitution
- Ratifier Intent
- Ratio Decidendi
- Rational Basis
- Rational Basis (Update)
- Rawle, William (1759–1836)
- Raymond Motor Transportation Company v. Rice 434 U.S. 429 (1978)
- Read, George (1733–1798)
- Reagan Administration (1981–1989), United States National Security Policy