| Jeff Smith | Agribusiness Association of Iowa | Undecided | GA90 |
| Maggie Smith-Fitzgerald | Agribusiness Association of Iowa | Undecided | GA90 |
| Matt Fitzgerald | Agribusiness Association of Iowa | Undecided | GA90 |
| Scott Newhard | Associated General Contractors of Iowa | Supporting | GA90 |
| Brad Epperly | BNSF Railway Co. | Undecided | GA90 |
| Dustin Miller | BNSF Railway Co. | Undecided | GA90 |
| Kate Walton | CN Rail | Undecided | GA90 |
| Madeleine Bradley | CN Rail | Undecided | GA90 |
| Matt Eide | CN Rail | Undecided | GA90 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA90 |
| Gary Grant | City of Cedar Rapids | Undecided | GA90 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA90 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Supporting | 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 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA90 |
| Bobby Martens | Iowa Institute for Cooperatives | Undecided | GA90 |
| Rebecca Boyer | Iowa Institute for Cooperatives | Undecided | GA90 |
| David Scott | Iowa Motor Truck Association | Supporting | 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 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA90 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA90 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA90 |
| William Peterson | Iowa State Association of Counties | Undecided | GA90 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA90 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA90 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA90 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA90 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA90 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA90 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA90 |
| Gary Grant | Urban County Coalition | Undecided | GA90 |
| Larry Murphy | Urban County Coalition | Undecided | GA90 |