| Kellie Paschke | Iowa Cattlemen's Association | Supporting | GA89 |
| Kelly Meyers | Iowa Cattlemen's Association | Supporting | GA89 |
| Logan Murray | Iowa Cattlemen's Association | Supporting | GA89 |
| Troy Skinner | Iowa Cattlemen's Association | Supporting | GA89 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA89 |
| Hannah McDowell | Iowa Farmers Union | Undecided | GA89 |
| Nick Laning | Iowa Farmers Union | Undecided | GA89 |
| Threase Harms | Iowa Farmers Union | Undecided | GA89 |
| Jim Obradovich | Iowa Honey Producers Association | Supporting | GA89 |
| Robert Mulqueen | Iowa Honey Producers Association | Supporting | GA89 |
| Drew Mogler | Iowa Pork Producers Association | Supporting | GA89 |
| Jeff Smith | Iowa Pork Producers Association | Supporting | GA89 |
| Jerry Fitzgerald | Iowa Pork Producers Association | Supporting | GA89 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Supporting | GA89 |
| Matt Fitzgerald | Iowa Pork Producers Association | Supporting | GA89 |
| Doug Struyk | Iowa Veterinary Medical Association | Supporting | GA89 |
| Jennifer Dorman | Iowa Veterinary Medical Association | Supporting | GA89 |
| Jim Carney | Iowa Veterinary Medical Association | Supporting | GA89 |
| Kate Walton | Missouri River Energy Services | Withdrawn | GA89 |
| Kate Walton | Missouri River Energy Services | Undecided | GA89 |
| Kersten Johnson | Missouri River Energy Services | Withdrawn | GA89 |
| Kersten Johnson | Missouri River Energy Services | Undecided | GA89 |
| Matt Eide | Missouri River Energy Services | Withdrawn | GA89 |
| Matt Eide | Missouri River Energy Services | Undecided | GA89 |