Lobbyist
Top candidates
| 1. John Doolittle, Republican | $145,194 |
| 2. John McCain, Republican, Conservative Party of New York , Independence Party of New York | $135,400 |
| 3. Richard Durbin, Democratic | $108,544 |
| 4. Jerry Lewis, Republican | $95,500 |
| 5. Donald Young, Republican | $73,975 |
Top committees
| 1. Democratic Senatorial Campaign Committee | $272,200 |
| 2. Bush-Cheney '04 (Primary) Inc | $256,325 |
| 3. Democratic Congressional Campaign Committee | $228,450 |
| 4. Republican National Committee | $185,907 |
| 5. John T. Doolittle For Congress | $145,194 |
