| Kate Walton | CN Rail | Undecided | GA90 |
| Madeleine Bradley | CN Rail | Undecided | GA90 |
| Matt Eide | CN Rail | Undecided | GA90 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Undecided | GA90 |
| Amy Campbell | Iowa Behavioral Health Association (IBHA) | Undecided | GA90 |
| Craig Patterson | Iowa Behavioral Health Association (IBHA) | Undecided | GA90 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA90 |
| Kelly Meyers | Iowa Cattlemen's Association | Undecided | GA90 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA90 |
| Kelly Meyers | Iowa County Attorneys Association | Supporting | GA90 |
| Tom Ferguson | Iowa County Attorneys Association | Supporting | GA90 |
| Josie Wagler | Iowa Dept. of Public Safety | Undecided | GA90 |
| David Scott | Iowa Motor Truck Association | Undecided | GA90 |
| David Adelman | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA90 |
| Frank Chiodo | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA90 |
| Lillie Brady | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA90 |
| Matt Hinch | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA90 |
| Sara Allen | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA90 |
| Amy Campbell | League of Women Voters of Iowa | Supporting | GA90 |
| Craig Patterson | League of Women Voters of Iowa | Supporting | GA90 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA90 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA90 |
| Gary Grant | Urban County Coalition | Undecided | GA90 |
| Larry Murphy | Urban County Coalition | Undecided | GA90 |