Reported by the Center for Responsive Politics. Names in italics denote incumbent, and those in boldface denote winner.
10. Nebraska: $18,800,051
| Pete Ricketts (R.) | Spent: $11,302,078 | Raised: $12,997,458 |
| Ben Nelson (D.) | Spent: $7,497,973 | Raised: $7,668,661 |
9. Florida: $18,855,996
| Bill Nelson (D.) | Spent: $11,085,250 | Raised: $17,704,022 |
| Katherine Harris (R.) | Spent: $7,737,906 | Raised: $8,783,508 |
| Other | Spent: $32,840 | Raised: $43,177 |
8. Ohio: $20,762,238
| Mike DeWine (R.) | Spent: $11,807,805 | Raised: $13,962,005 |
| Sherrod Brown (D.) | Spent: $8,954,433 | Raised: $7,689,115 |
7. Washington: $22,548,549
| Maria Cantwell (D.) | Spent: $13,803,318 | Raised: $18,236,993 |
| Michael McGavick (R.) | Spent: $8,610,285 | Raised: $9,568,239 |
| Other | Spent: $134,946 | Raised: $1,339,407 |
6. Arizona: $23,830,520
| Jim Pederson (D.) | Spent: $12,314,616 | Raised: $12,406,902 |
| Jon Kyl (R.) | Spent: $11,515,904 | Raised: $13,713,968 |
5. Tennessee: $24,803,651
| Bob Corker (R.) | Spent: $14,200,790 | Raised: $15,173,962 |
| Harold Ford, Jr. (D.) | Spent: $10,602,861 | Raised: $9,886,998 |
4. Connecticut: $26,160,754
| Joseph Lieberman (I.) | Spent: $13,362,421 | Raised: $16,822,226 |
| Ned Lamont (D.) | Spent: $12,648,793 | Raised: $13,898,217 |
| Other | Spent: $149,540 | Raised: $202,938 |
3. Missouri: $27,886,361
| Jim Talent (R.) | Spent: $19,408,892 | Raised: $22,070,958 |
| Claire McCaskill (D.) | Spent: $8,475,845 | Raised: $9,124,019 |
| Other | Spent: $1,624 | Raised: $202,938 |
2. Pennsylvania: $37,767,899
| Rick Santorum (R.) | Spent: $24,101,782 | Raised: $26,323,111 |
| Bob Casey (D.) | Spent: $13,666,117 | Raised: $16,348,820 |
1. New York: $40,749,449
| Hillary Clinton (D.) | Spent: $35,921,038 | Raised: $49,588,100 |
| John Spencer (R.) | Spent: $4,796,224 | Raised: $5,138,870 |
| Other | Spent: $32,187 | Raised: $54,856 |
