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|  | Pages | Encyclopedia Entry |
| | Pages | Encyclopedia Entry |
| | Parliamentarian | Encyclopedia Entry |
| | Parliamentarian | Encyclopedia Entry |
| | Party Discipline | Encyclopedia Entry |
| | Party Leadership in Congress, 1977–2007 | Facts & Figures |
| | Patronage, Congressional | Encyclopedia Entry |
| | Patronage | Encyclopedia Entry |
| | Pay and Perquisites, Congressional | Encyclopedia Entry |
| | Pay and Perquisites | Encyclopedia Entry |
| | Pay-as-You-Go (PAYGO) | Encyclopedia Entry |
| | Pelosi, Nancy | Biography |
| | Permanent Appropriation, Authorization | Encyclopedia Entry |
| | Petition | Encyclopedia Entry |
| | Petition | Encyclopedia Entry |
| | Point of Order | Encyclopedia Entry |
| | Point of Order | Encyclopedia Entry |
| | Policy Committee | Encyclopedia Entry |
| | Political Action Committees (PAC) | Encyclopedia Entry |
| | Political Action Committees (PACs) | Encyclopedia Entry |
| | Political Parties in Congress | Encyclopedia Entry |
| | Political Parties | Encyclopedia Entry |
| | Political Party Affiliations in Congress and the Presidency, 1789–2007 | Facts & Figures |
| | Pork-Barrel Politics | Encyclopedia Entry |
| | Pork-Barrel Politics | Encyclopedia Entry |
| | Powell, Adam Clayton, Jr. | Biography |
| | President and Congress | Encyclopedia Entry |
| | President of the Senate | Encyclopedia Entry |
| | President Pro Tempore | Encyclopedia Entry |
| | President Pro Tempore | Encyclopedia Entry |
| | Presidential Disability and Succession | Encyclopedia Entry |
| | Presidential Disability and Succession | Encyclopedia Entry |
| | Presidents Who Served in Congress | Encyclopedia Entry |
| | Presidents Who Served in Congress | Encyclopedia Entry |
| | Presiding Officer | Encyclopedia Entry |
| | Presiding Officer | Encyclopedia Entry |
| | Press and Congress | Encyclopedia Entry |
| | Press and Congress | Encyclopedia Entry |
| | Previous Question | Encyclopedia Entry |
| | Previous Question | Encyclopedia Entry |
| | Printing Committee, Joint | Encyclopedia Entry |
| | Printing Committee, Joint | Encyclopedia Entry |
| | Private Bill | Encyclopedia Entry |
| | Private Bill | Encyclopedia Entry |
| | Privilege | Encyclopedia Entry |
| | Privilege | Encyclopedia Entry |
| | Progressive Era | Encyclopedia Entry |
| | Progressive Era | Encyclopedia Entry |
| | Proxy Voting | Encyclopedia Entry |
| | Purse, Power of | Encyclopedia Entry |
| | Purse, Power of | Encyclopedia Entry |
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