| Christopher Rants | Center for Rural Affairs | Undecided | GA88 |
| Cody Smith | Center for Rural Affairs | Undecided | GA88 |
| John Cacciatore | Center for Rural Affairs | Undecided | GA88 |
| Jim Obradovich | County Zoning Officials Organiztion | Opposing | GA88 |
| Pete McRoberts | County Zoning Officials Organiztion | Opposing | GA88 |
| Robert Mulqueen | County Zoning Officials Organiztion | Opposing | GA88 |
| Maddie Wilcox | Grow Clinton County | Undecided | GA88 |
| Threase Harms | Grow Clinton County | Undecided | GA88 |
| Jennifer Kingland | Iowa Association of Realtors | Supporting | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA88 |
| John Murphy | Iowa County Recorders Association | Undecided | GA88 |
| Angela Davis | Iowa Environmental Council | Undecided | GA88 |
| Don Petersen | Iowa Farm Bureau Federation | Supporting | GA88 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA88 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA88 |
| Drew Mogler | Iowa Pork Producers Association | Supporting | GA88 |
| Jeff Smith | Iowa Pork Producers Association | Supporting | GA88 |
| Jerry Fitzgerald | Iowa Pork Producers Association | Supporting | GA88 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Supporting | GA88 |
| Matt Fitzgerald | Iowa Pork Producers Association | Supporting | 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 |
| Matt Eide | Iowa Wine Growers Association | Undecided | GA88 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA88 |
| Gary Grant | Linn County Board of Supervisors | Withdrawn | GA88 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Withdrawn | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Withdrawn | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA88 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA88 |
| Brian Johnson | Polk County - Board of Supervisors | Opposing | GA88 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA88 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA88 |
| Gary Grant | Urban County Coalition | Opposing | GA88 |
| Gary Grant | Urban County Coalition | Withdrawn | GA88 |
| Gary Grant | Urban County Coalition | Undecided | GA88 |
| Larry Murphy | Urban County Coalition | Opposing | GA88 |
| Larry Murphy | Urban County Coalition | Withdrawn | GA88 |
| Larry Murphy | Urban County Coalition | Undecided | GA88 |
| Meghan Malloy | Urban County Coalition | Opposing | GA88 |
| Meghan Malloy | Urban County Coalition | Withdrawn | GA88 |
| Meghan Malloy | Urban County Coalition | Undecided | GA88 |