| Katie Rock | BlueGreen Alliance | Supporting | GA91 |
| Christopher Rants | Center for Rural Affairs | Undecided | GA91 |
| Cynthia Farmer | Center for Rural Affairs | Undecided | GA91 |
| Jake Friedrichsen | Center for Rural Affairs | Undecided | GA91 |
| Jacob Schrader | Central Iowa Water Works | Undecided | GA91 |
| Logan Murray | Central Iowa Water Works | Undecided | GA91 |
| Sydney Gangestad | Central Iowa Water Works | Undecided | GA91 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA91 |
| Matt Ohloff | Environmental Law and Policy Center | 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 |
| Catherine Pollard | Iowa Environmental Council | Undecided | GA91 |
| Cody Smith | Iowa Environmental Council | Undecided | GA91 |
| Colleen Fowle | Iowa Environmental Council | Undecided | GA91 |
| Jordan Oster | Iowa Environmental Council | Undecided | GA91 |
| Kerri Johannsen | Iowa Environmental Council | Undecided | GA91 |
| Michael Schmidt | Iowa Environmental Council | Undecided | GA91 |
| Sarah Green | Iowa Environmental Council | Undecided | GA91 |
| Threase Harms | Iowa Environmental Council | Undecided | GA91 |
| Catherine Pollard | Iowa Farmers Union | Undecided | GA91 |
| Threase Harms | Iowa Farmers Union | Undecided | GA91 |
| Andy Conlin | Iowa Manufactured Housing Association | Undecided | GA91 |
| Dennis Tibben | Iowa Manufactured Housing Association | Undecided | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Supporting | GA91 |
| Beth Manley | 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 |
| Beth Manley | 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 |
| Dane Schumann | Izaak Walton League - Iowa Division | Undecided | GA91 |
| Amy Campbell | League of Women Voters of Iowa | Undecided | GA91 |
| Craig Patterson | League of Women Voters of Iowa | Undecided | GA91 |
| Doug Struyk | The Nature Conservancy | Undecided | GA91 |
| Emily Kavanagh | The Nature Conservancy | Undecided | GA91 |
| Jennifer Dorman | The Nature Conservancy | Undecided | GA91 |
| Jim Carney | The Nature Conservancy | Undecided | GA91 |