| Candidate | Party | State | Total contributions to candidate |
|---|---|---|---|
| 1 TOM VILSACK & SALLY PEDERSON | Democratic | Iowa | $276,950 |
| 2 FREDERICK SHELTON (FRED) HUBBELL & RITA ROTTINGHAUS HART | Democratic | Iowa | $275,000 |
| 3 NATHANIEL R (NATE) BOULTON | Democratic | Iowa | $201,500 |
| 4 CHET CULVER & PATTY JUDGE | Democratic | Iowa | $176,000 |
| 5 MIKE BLOUIN | Democratic | Iowa | $150,175 |