| Brad Epperly | BNSF Railway Co. | Undecided | GA88 |
| Dustin Miller | BNSF Railway Co. | Undecided | GA88 |
| Katie Graham | BNSF Railway Co. | Undecided | GA88 |
| Paula Dierenfeld | BNSF Railway Co. | Undecided | GA88 |
| Kate Walton | CN Rail | Undecided | GA88 |
| Matt Eide | CN Rail | Undecided | GA88 |
| Jeff Smith | Iowa Corn Growers Association | Supporting | GA88 |
| Jerry Fitzgerald | Iowa Corn Growers Association | Supporting | GA88 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Supporting | GA88 |
| Matt Fitzgerald | Iowa Corn Growers Association | Supporting | GA88 |
| Mindy Poldberg | Iowa Corn Growers Association | Supporting | GA88 |
| Lyle Brehm | Iowa County Engineers Association | Undecided | GA88 |
| Don Petersen | Iowa Farm Bureau Federation | Supporting | GA88 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA88 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA88 |
| Dane Schumann | Iowa Farmers Union | Undecided | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Undecided | GA88 |
| Threase Harms | Iowa Farmers Union | Undecided | GA88 |
| David Adelman | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA88 |
| Frank Chiodo | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA88 |
| Matt Hinch | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA88 |
| Sara Allen | Iowa Nebraska Farm Equipment Dealers Association | Undecided | GA88 |
| Will Rogers | Iowa Nebraska Farm Equipment Dealers Association | Supporting | GA88 |
| Drew Mogler | Iowa Pork Producers Association | Undecided | GA88 |
| Jeff Smith | Iowa Pork Producers Association | Undecided | GA88 |
| Jerry Fitzgerald | Iowa Pork Producers Association | Undecided | GA88 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Undecided | GA88 |
| Matt Fitzgerald | Iowa Pork Producers Association | Undecided | GA88 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Undecided | GA88 |
| Paula Feltner | Iowa Renewable Fuels Association (IRF) | Undecided | GA88 |
| Jim Obradovich | Iowa Shortline and Regional Railroad Association | Undecided | GA88 |
| Jill Altringer | Iowa Soybean Association | Supporting | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA88 |
| William Peterson | Iowa State Association of Counties | Undecided | GA88 |
| William Peterson | Iowa State Association of Counties | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Opposing | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Opposing | GA88 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA88 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA88 |
| Jim Carney | Iowa State Bar Association | Undecided | GA88 |
| David Adelman | Iowa Wood Industry Association | Undecided | GA88 |
| Matt Hinch | Iowa Wood Industry Association | Undecided | GA88 |
| Sara Allen | Iowa Wood Industry Association | Undecided | GA88 |
| Brad Epperly | Monsanto Company | Supporting | GA88 |
| Dustin Miller | Monsanto Company | Supporting | GA88 |
| Katie Graham | Monsanto Company | Supporting | GA88 |
| Michael Triplett | Union Pacific Railroad | Undecided | GA88 |