| DEMOCRATIC PARTY OF WISCONSIN FEDERAL | $201K | 9 | 1994, 2006 |
| AFL-CIO | $86K | 12 | 1994, 2006, 1988, 2000 |
| HERB KOHL FOR UNITED STATES SENATE INC | $51K | 2 | 2006 |
| WISCONSIN STATE AFL-CIO | $39K | 3 | 1988 |
| PLANNED PARENTHOOD ADVOCATES OF WI | $16K | 1 | 2000 |
| WISCONSIN RIGHT TO LIFE INC POLITICAL ACTION COMMITTEE | $8K | 44 | 1994, 2000 |
| AMERICAN INSTITUTE OF CERTIFIED PUBLIC ACCOUNTANTS POLITICAL ACTION COMMITTEE | $5K | 1 | 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO | $2K | 1 | 2000 |
| BAKERY, CONFECTIONERY, TOBACCO WORKERS AND GRAIN MILLERS INTERNATIONAL UNION PAC | $2K | 3 | 1988 |
| INTERNATIONAL UNION, ALLIED INDUSTRIAL WORKERS | $1K | 1 | 1988 |