| Drew Klein | Americans For Prosperity | Undecided | GA88 |
| Tyler Raygor | Americans For Prosperity | Undecided | GA88 |
| Christopher Riley | Archer Daniels Midland Company | Supporting | GA88 |
| 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 |
| Ken Hansen | Brotherhood of Locomotive Engineers and Trainmen | Undecided | GA88 |
| Kate Walton | CN Rail | Undecided | GA88 |
| Matt Eide | CN Rail | Undecided | GA88 |
| Tim Reilly | Department of Revenue | Undecided | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA88 |
| Susan Fenton | Iowa Dept. of Transportation | Undecided | GA88 |
| Bobby Martens | Iowa Institute for Cooperatives | Supporting | GA88 |
| Katie Hall | Iowa Institute for Cooperatives | Supporting | GA88 |
| Mike Rozenboom | Iowa Northern Railway Company | Supporting | GA88 |
| Robert Weiser | Iowa Northern Railway Company | Supporting | GA88 |
| Amy Campbell | Iowa Public Transit Association (IPT) | Undecided | GA88 |
| Craig Patterson | Iowa Public Transit Association (IPT) | Undecided | GA88 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Supporting | GA88 |
| Nathan Hohnstein | Iowa Renewable Fuels Association (IRF) | Supporting | GA88 |
| Paula Feltner | Iowa Renewable Fuels Association (IRF) | Supporting | GA88 |
| Jim Obradovich | Iowa Shortline and Regional Railroad Association | Supporting | GA88 |
| Gary Grant | Midwestern Trading, Inc. | Undecided | GA88 |
| Larry Murphy | Midwestern Trading, Inc. | Undecided | GA88 |
| Meghan Malloy | Midwestern Trading, Inc. | Undecided | GA88 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA88 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA88 |
| Kent Hartwig | Renewable Energy Group (REG) | Supporting | GA88 |
| Scott Hedderich | Renewable Energy Group (REG) | Supporting | GA88 |
| Chris Smith | SMART-Transportation Division | Undecided | GA88 |
| Jonathan Todhunter | SMART-Transportation Division | Undecided | GA88 |
| Amy Campbell | Travel Federation of Iowa | Undecided | GA88 |
| Craig Patterson | Travel Federation of Iowa | Undecided | GA88 |