Donations made to political groups or candidates must be disclosed under state law for greater transparency in elections. While Congress created the Federal Election Commission to oversee federal elections in 1974, each state is left to regulate its local elections.
Top committees ranked by total contributions (May)
| Rank | Committee | Amount | Median contribution amount |
|---|---|---|---|
| 1 | Democratic Party of Wisconsin | $713,031 | $25 |
| 2 | Republican Party of Wisconsin | $121,680 | $110 |
| 3 | Murphy for Wisconsin | $24,631 | $24,631 |
| 4 | Marinette County Democratic Party | $6,755 | $300 |
| 5 | Plumbers Local 75 PAC | $6,560 | $8 |
| 6 | Republican Party of Walworth County | $6,355 | $20 |
| 7 | Waupaca Democratic Party | $5,563 | $100 |
| 8 | Republican Party of Trempealeau County | $4,808 | $35 |
| 9 | Friends of Cindi Duchow | $4,250 | $100 |
| 10 | Spiros for Assembly | $4,115 | $75 |
| 11 | Friends of Ron Tusler | $3,480 | $100 |
| 12 | The Northwestern Mutual Life Insurance Company Political Action Committee | $3,431 | $4 |
| 13 | WEC Energy Group PAC (WECPAC) | $3,022 | $5 |
| 14 | Joel Kitchens for Assembly | $2,635 | $100 |
| 15 | Wisconsin Pipe Trades Assn PAC | $2,583 | $1 |
| 16 | Steve Kauffeld for Assembly | $2,475 | $69 |
| 17 | Taxpayers for Shae Sortwell | $2,441 | $75 |
| 18 | Buffalo Co Republican Party | $2,131 | $60 |
| 19 | Fire Fighters for a Better Wisconsin | $1,972 | $22 |
| 20 | Bell Ambulance, Inc. Employees PAC | $1,939 | $195 |
| 21 | Democrat Republican Independent Voter Education | $1,650 | $150 |
| 22 | Democratic Party of Brown County | $1,421 | $15 |
| 23 | Tauchen for Assembly | $1,420 | $100 |
| 24 | Wisconsin Credit Union Legislative Action Fund | $1,315 | $1 |
| 25 | Steamfitters Local 601 PAC | $1,227 | $1 |
| 26 | Rick Gundrum for 58th Assembly | $1,105 | $25 |
| 27 | Marinette County Republican Party | $1,059 | $25 |
| 28 | Wisconsin Association of Nurse Anesthetists PAC | $785 | $30 |
| 29 | Portage County Democratic Party | $655 | $30 |
| 30 | Hong For Assembly | $593 | $10 |
| 31 | Friends of Dianne Hesselbein | $550 | $275 |
| 32 | Constitution Party of WI | $535 | $50 |
| 32 | 8th Congressional District Democratic Party | $535 | $25 |
| 34 | Democratic Party of Racine County | $533 | $25 |
| 35 | Don Vruwink for Assembly | $505 | $50 |
| 36 | Democratic Party of Door Co | $500 | $25 |
| 37 | Wisconsin Physical Therapy | $485 | $15 |
| 38 | Bayfield County Republican Party | $405 | $20 |
| 39 | Friends of Tod Ohnstad | $335 | $25 |
| 40 | Fond du Lac Co Democratic Party | $285 | $25 |
| 41 | Winnebago County Democratic Party | $275 | $40 |
| 42 | St Croix County Republican Party | $260 | $60 |
| 43 | Democratic Party of Oconto Co | $211 | $100 |
| 44 | Friends of Sue Conley | $200 | $200 |
| 45 | Taylor County Republican Party | $175 | $30 |
| 46 | Republican Party of Portage County | $150 | $38 |
| 47 | Rusk Co Republican Party | $130 | $50 |
| 48 | Pro-Life WI Victory Fund PAC | $107 | $5 |
| 49 | Pierce Co Democratic Party | $100 | $100 |
| 49 | WI Grocers Assn PAC | $100 | $100 |
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