| Larry Murphy | Agribusiness Assn. of IA | Undecided | GA83 |
| Mona Bond | Agribusiness Assn. of IA | Undecided | GA83 |
| Nicole Woodroffe | Annett Holdings | Undecided | GA83 |
| Robert Weiser | Annett Holdings | Undecided | GA83 |
| Brad Epperly | BNSF Railway Co. | Undecided | GA83 |
| James West | BNSF Railway Co. | Undecided | GA83 |
| Keith Luchtel | BNSF Railway Co. | Undecided | GA83 |
| Paula Dierenfeld | BNSF Railway Co. | Undecided | GA83 |
| Scott Sundstrom | BNSF Railway Co. | Undecided | GA83 |
| John Pederson | CN | Undecided | GA83 |
| Matt Eide | CN | Undecided | GA83 |
| Nicole Woodroffe | CRST International | Undecided | GA83 |
| Robert Weiser | CRST International | Undecided | GA83 |
| Jerry Fitzgerald | IA. Corn Growers Assn.(ICG) | Supporting | GA83 |
| Jerry Fitzgerald | IA. Corn Growers Assn.(ICG) | Undecided | GA83 |
| Maggie Smith-Fitzgerald | IA. Corn Growers Assn.(ICG) | Supporting | GA83 |
| Maggie Smith-Fitzgerald | IA. Corn Growers Assn.(ICG) | Undecided | GA83 |
| Mark Joyce | IA. Corn Growers Assn.(ICG) | Supporting | GA83 |
| Mark Joyce | IA. Corn Growers Assn.(ICG) | Undecided | GA83 |
| Mindy Poldberg | IA. Corn Growers Assn.(ICG) | Supporting | GA83 |
| Lyle Brehm | IA. County Engineers Assn. | Undecided | GA83 |
| Lyle Brehm | IA. County Engineers Assn. | Opposing | GA83 |
| Ross Loder | IA. Dept. of Public Safety | Undecided | GA83 |
| Elizabeth Baird | IA. Dept. of Transportation | Undecided | GA83 |
| John Pederson | IA. Ethanol Producers Assn. | Undecided | GA83 |
| John Pederson | IA. Ethanol Producers Assn. | Supporting | GA83 |
| Matt Eide | IA. Ethanol Producers Assn. | Undecided | GA83 |
| Matt Eide | IA. Ethanol Producers Assn. | Supporting | GA83 |
| Amber Markham | IA. Farm Bureau Federation | Supporting | GA83 |
| Amber Markham | IA. Farm Bureau Federation | Undecided | GA83 |
| Joe Johnson | IA. Farm Bureau Federation | Supporting | GA83 |
| Joe Johnson | IA. Farm Bureau Federation | Undecided | GA83 |
| Mark Salvador | IA. Farm Bureau Federation | Supporting | GA83 |
| Mark Salvador | IA. Farm Bureau Federation | Undecided | GA83 |
| David Scott | IA. Motor Truck Assn. | Opposing | GA83 |
| Will Rogers | IA. Nebraska Farm Equipment Dealers Assn. | Undecided | GA83 |
| Jerry Fitzgerald | IA. Renewable Fuels Assn. (IRF) | Supporting | GA83 |
| Jerry Fitzgerald | IA. Renewable Fuels Assn. (IRF) | Undecided | GA83 |
| Maggie Smith-Fitzgerald | IA. Renewable Fuels Assn. (IRF) | Supporting | GA83 |
| Maggie Smith-Fitzgerald | IA. Renewable Fuels Assn. (IRF) | Undecided | GA83 |
| Mark Joyce | IA. Renewable Fuels Assn. (IRF) | Supporting | GA83 |
| Mark Joyce | IA. Renewable Fuels Assn. (IRF) | Undecided | GA83 |
| Montgomery Shaw | IA. Renewable Fuels Assn. (IRF) | Supporting | GA83 |
| Jim Obradovich | IA. Shortline and Regional Railroad Assn. | Opposing | GA83 |
| Jill Altringer | IA. Soybean Assn. | Supporting | GA83 |
| Jill Altringer | IA. Soybean Assn. | Undecided | GA83 |
| Hanna DeGroot | IA. State Assn. of Counties | Undecided | GA83 |
| Linda Hinton | IA. State Assn. of Counties | Undecided | GA83 |
| Nathan Bonnett | IA. State Assn. of Counties | Undecided | GA83 |
| William Peterson | IA. State Assn. of Counties | Undecided | GA83 |
| Michael Wentzien | IA. State Assn. of County Supervisors | Undecided | GA83 |
| Michael Wentzien | IA. State Assn. of County Supervisors | Opposing | GA83 |
| Brad Epperly | Monsanto Company | Undecided | GA83 |
| James West | Monsanto Company | Undecided | GA83 |
| Keith Luchtel | Monsanto Company | Undecided | GA83 |
| Paula Dierenfeld | Monsanto Company | Undecided | GA83 |
| Scott Sundstrom | Monsanto Company | Undecided | GA83 |
| Cal Hultman | Union Pacific Railroad | Opposing | GA83 |
| Mary Hultman | Union Pacific Railroad | Opposing | GA83 |
| Michael Triplett | Union Pacific Railroad | Opposing | GA83 |