Encyclopedias, Almanacs, Transcripts, and Maps
- Posadas De Puerto Rico Associates v. Tourism Company of Puerto Rico 478 U.S. 328 (1986)
- Posse Comitatus Act 20 Stat. 145 (1878)
- Postal Power
- Postal Security
- Postmodernism and Constitutional Interpretation
- Pound, Roscoe (1870–1964)
- Poverty Law
- Powell v. Alabama 287 U.S. 45 (1932)
- Powell v. McCormack 395 U.S. 486 (1969)
- Powell, Lewis F., Jr. (1907–)
- Powell, Lewis F., JR. (1907–1998) (Update)
- Powell, Thomas Reed (1880–1955)
- Pragmatism (Update)
- Pratt, Charles (Lord Camden) (1714–1794)
- Preemption (Update)
- Preferred Freedoms
- President and the Treaty Power
- Presidential Immunity
- Presidential Ordinance-Making Power
- Presidential Spending Power