| Mark Joyce | Boyd Gaming-Peninsula Gaming LLC & Dubuque Diamond Jo & Diamond Jo Worth | Supporting | GA89 |
| Ryan Soultz | Boyd Gaming-Peninsula Gaming LLC & Dubuque Diamond Jo & Diamond Jo Worth | Supporting | GA89 |
| Doug Struyk | Caesars Enterprise Services, LLC. | Supporting | GA89 |
| Jennifer Dorman | Caesars Enterprise Services, LLC. | Supporting | GA89 |
| Jim Carney | Caesars Enterprise Services, LLC. | Supporting | GA89 |
| David Adelman | Elite Casino Resorts, LLC | Opposing | GA89 |
| Frank Chiodo | Elite Casino Resorts, LLC | Opposing | GA89 |
| Lillie Brady | Elite Casino Resorts, LLC | Opposing | GA89 |
| Matt Hinch | Elite Casino Resorts, LLC | Opposing | GA89 |
| Sara Allen | Elite Casino Resorts, LLC | Opposing | GA89 |
| Scott Newhard | Elite Casino Resorts, LLC | Opposing | GA89 |
| Marcus Haack | Episcopal Diocese of Iowa | Opposing | GA89 |
| Wendy Abrahamson | Episcopal Diocese of Iowa | Opposing | GA89 |
| Doug Struyk | Great River Entertainment | Supporting | GA89 |
| Jennifer Dorman | Great River Entertainment | Supporting | GA89 |
| Jim Carney | Great River Entertainment | Supporting | GA89 |
| Jon Moss | Horsemen's Benevolent and Protective Association (IHBPA) | Opposing | GA89 |
| Jon Moss | Horsemen's Benevolent and Protective Association (IHBPA) | Undecided | GA89 |
| Morgan Fritz | Horsemen's Benevolent and Protective Association (IHBPA) | Opposing | GA89 |
| Morgan Fritz | Horsemen's Benevolent and Protective Association (IHBPA) | Undecided | GA89 |
| Robert Weiser | Horsemen's Benevolent and Protective Association (IHBPA) | Opposing | GA89 |
| Robert Weiser | Horsemen's Benevolent and Protective Association (IHBPA) | Undecided | GA89 |
| Brad Cranston | Iowa Baptists For Biblical Values | Opposing | GA89 |
| Amy Campbell | Iowa Behavioral Health Association (IBHA) | Opposing | GA89 |
| Amy Campbell | Iowa Behavioral Health Association (IBHA) | Undecided | GA89 |
| Craig Patterson | Iowa Behavioral Health Association (IBHA) | Opposing | GA89 |
| Craig Patterson | Iowa Behavioral Health Association (IBHA) | Undecided | GA89 |
| Larry Murphy | Iowa Catholic Conference | Opposing | GA89 |
| Meghan Malloy | Iowa Catholic Conference | Opposing | GA89 |
| Tom Chapman | Iowa Catholic Conference | Opposing | GA89 |
| Brian Carter | Iowa Conference of United Methodist Church | Opposing | GA89 |
| Gary Nims | Iowa Conference of United Methodist Church | Opposing | GA89 |
| Rita Carter | Iowa Conference of United Methodist Church | Opposing | GA89 |
| Sara Throener | Iowa Dept. of Inspections and Appeals | Undecided | GA89 |
| Sarah Jennings | Iowa Dept. of Public Safety | Undecided | GA89 |
| Wes Ehrecke | Iowa Gaming Association | Undecided | GA89 |
| Kate Walton | Iowa Harness Horsemen's Association | Undecided | GA89 |
| Madeleine Bradley | Iowa Harness Horsemen's Association | Undecided | GA89 |
| Matt Eide | Iowa Harness Horsemen's Association | Undecided | GA89 |
| Mary Neubauer | Iowa Lottery Authority | Undecided | GA89 |
| Megan Tooker | Iowa Lottery Authority | Undecided | GA89 |
| Morgan Fritz | Iowa Thoroughbred Breeders and Owners Association | Opposing | GA89 |
| Morgan Fritz | Iowa Thoroughbred Breeders and Owners Association | Undecided | GA89 |
| Robert Weiser | Iowa Thoroughbred Breeders and Owners Association | Opposing | GA89 |
| Robert Weiser | Iowa Thoroughbred Breeders and Owners Association | Undecided | GA89 |
| Brian Johnson | Iowa West Racing Association | Undecided | GA89 |
| Craig Walter | Iowa West Racing Association | Undecided | GA89 |
| Madeleine Bradley | Iowa West Racing Association | Undecided | GA89 |
| Matt Eide | Iowa West Racing Association | Undecided | GA89 |
| Kate Walton | Iowa Wine Growers Association | Undecided | GA89 |
| Kimberly Haus | Penn National Gaming/Ameristar | Supporting | GA89 |
| Susan Cameron Daemen | Penn National Gaming/Ameristar | Supporting | GA89 |
| Tony Phillips | Penn National Gaming/Ameristar | Supporting | GA89 |
| Amy Campbell | Polk County - Board of Supervisors | Opposing | GA89 |
| Craig Patterson | Polk County - Board of Supervisors | Opposing | GA89 |
| Kellie Paschke | Prairie Meadows Racetrack and Casino | Opposing | GA89 |
| Kelly Meyers | Prairie Meadows Racetrack and Casino | Opposing | GA89 |
| Logan Murray | Prairie Meadows Racetrack and Casino | Opposing | GA89 |
| Troy Skinner | Prairie Meadows Racetrack and Casino | Opposing | GA89 |
| Marc Beltrame | Scientific Games Corporation | Undecided | GA89 |
| Christopher Rants | Sports Betting Alliance | Supporting | GA89 |
| John Cacciatore | Sports Betting Alliance | Supporting | GA89 |
| Lon Anderson | Sports Betting Alliance | Supporting | GA89 |
| Chuck Hurley | The Family Leader | Opposing | GA89 |
| Daniel Sunne | The Family Leader | Opposing | GA89 |
| Danny Carroll | The Family Leader | Opposing | GA89 |
| Rebekah Oleson | The Family Leader | Opposing | GA89 |
| Chuck Hurley | The Family Leader Foundation | Opposing | GA89 |
| Daniel Sunne | The Family Leader Foundation | Opposing | GA89 |
| Danny Carroll | The Family Leader Foundation | Opposing | GA89 |
| Denise Bubeck | The Family Leader Foundation | Opposing | GA89 |
| Greg Baker | The Family Leader Foundation | Opposing | GA89 |
| Rebekah Oleson | The Family Leader Foundation | Opposing | GA89 |
| Richard Gilson | Wild Rose Entertainment, LLC | Supporting | GA89 |