| Energy/Nuclear | Energy/Nuclear | 86 |
| Environment/Superfund | Environment/Superfund | 83 |
| Taxation/Internal Revenue Code | Taxation/Internal Revenue Code | 69 |
| Natural Resources | Natural Resources | 50 |
| Labor Issues/Antitrust/Workplace | Labor Issues/Antitrust/Workplace | 44 |
| Budget/Appropriations | Budget/Appropriations | 39 |
| Science/Technology | Science/Technology | 12 |
| Indian/Native American Affairs | Indian/Native American Affairs | 11 |
| Homeland Security | Homeland Security | 11 |
| Health Issues | Health Issues | 7 |
| Trade (domestic/foreign) | Trade (domestic/foreign) | 6 |
| Computer Industry | Computer Industry | 3 |
| Law Enforcement/Crime/Criminal Justice | Law Enforcement/Crime/Criminal Justice | 2 |
| Government Issues | Government Issues | 2 |
| Telecommunications | Telecommunications | 1 |
| Medicare/Medicaid | Medicare/Medicaid | 1 |
| Communications/Broadcasting/Radio/TV | Communications/Broadcasting/Radio/TV | 1 |
| Postal | Postal | 1 |
| Veterans | Veterans | 1 |