| Joseph Buffington | County Planning and Zoning Officials of Iowa | Opposing | GA88 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA88 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA88 |
| Maison Bleam | Iowa Department of Agriculture & Land Stewardship | Undecided | GA88 |
| Angela Davis | Iowa Environmental Council | Opposing | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Undecided | GA88 |
| Threase Harms | Iowa Farmers Union | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA88 |
| William Peterson | Iowa State Association of Counties | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Opposing | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Opposing | GA88 |
| Kate Walton | Iowa Wine Growers Association | Undecided | GA88 |
| Lauren Selfridge | Iowa Wine Growers Association | Undecided | GA88 |
| Matt Eide | Iowa Wine Growers Association | Undecided | GA88 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA88 |
| Brent Siegrist | Pottawattamie County Board of Supervisors | Opposing | GA88 |