| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA91 |
| David Adelman | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Frank Chiodo | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Matt Hinch | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Nathan Hohnstein | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Paige Thorson | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Sara Allen | Iowa Renewable Fuels Association (IRF) | Opposing | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Supporting | GA91 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA91 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA91 |
| Andrea Woodard | Iowa State Association of County Supervisors | Supporting | GA91 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA91 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA91 |
| Stephanie Weisenbach | Iowa Utilities Commission | Undecided | GA91 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA91 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA91 |
| Gary Grant | Urban County Coalition | Undecided | GA91 |
| Larry Murphy | Urban County Coalition | Undecided | GA91 |
| John Strathman | VALOR Iowa | Supporting | GA91 |