| Mark Stringer | American Civil Liberties Union of Iowa (ACLU-IA) | Supporting | GA90 |
| Pete McRoberts | American Civil Liberties Union of Iowa (ACLU-IA) | Supporting | GA90 |
| Rita Bettis Austen | American Civil Liberties Union of Iowa (ACLU-IA) | Supporting | GA90 |
| Gary Grant | City of Cedar Rapids | Undecided | GA90 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA90 |
| Mike Owen | Common Good Iowa | Opposing | GA90 |
| Natalie Veldhouse | Common Good Iowa | Opposing | GA90 |
| Sean Finn | Common Good Iowa | Opposing | GA90 |
| Sheila Hansen | Common Good Iowa | Opposing | GA90 |
| Kate Walton | Grow Clinton County | Undecided | GA90 |
| Madeleine Bradley | Grow Clinton County | Undecided | GA90 |
| Matt Eide | Grow Clinton County | Undecided | GA90 |
| Emily Piper | Iowa Association of School Boards | Undecided | GA90 |
| Michelle Johnson | Iowa Association of School Boards | Undecided | GA90 |
| Brad Epperly | Iowa Broadcasters Association | Undecided | GA90 |
| Dustin Miller | Iowa Broadcasters Association | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA90 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA90 |
| Tom Ferguson | Iowa County Attorneys Association | Undecided | GA90 |
| Census Lo-liyong | Iowa County Recorders Association | Undecided | GA90 |
| Alan Kemp | Iowa League of Cities | Supporting | GA90 |
| Daniel Stalder | Iowa League of Cities | Supporting | GA90 |
| Robert Palmer | Iowa League of Cities | Supporting | GA90 |
| Brad Epperly | Iowa Newspaper Association | Undecided | GA90 |
| Dustin Miller | Iowa Newspaper Association | Undecided | GA90 |
| Larry Murphy | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Undecided | GA90 |
| Brett Toresdahl | Iowa Public Information Board | Undecided | GA90 |
| Erika Eckley | Iowa Public Information Board | Undecided | GA90 |
| Margaret Johnson | Iowa Public Information Board | Undecided | GA90 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA90 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Supporting | GA90 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA90 |
| William Peterson | Iowa State Association of County Supervisors | Supporting | GA90 |
| Chris Hagenow | Iowans for Tax Relief | Supporting | GA90 |
| Victoria Sinclair | Iowans for Tax Relief | Supporting | GA90 |
| Amy Campbell | League of Women Voters of Iowa | Undecided | GA90 |
| Craig Patterson | League of Women Voters of Iowa | Undecided | GA90 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA90 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA90 |
| Kellie Paschke | Marion County Board of Supervisors | Undecided | GA90 |
| Kelly Meyers | Marion County Board of Supervisors | Undecided | GA90 |
| Troy Skinner | Marion County Board of Supervisors | Undecided | GA90 |
| David Adelman | Metropolitan Coalition | Undecided | GA90 |
| Frank Chiodo | Metropolitan Coalition | Undecided | GA90 |
| Lillie Brady | Metropolitan Coalition | Undecided | GA90 |
| Matt Hinch | Metropolitan Coalition | Undecided | GA90 |
| Sara Allen | Metropolitan Coalition | Undecided | GA90 |
| Gary Grant | Urban County Coalition | Undecided | GA90 |
| Larry Murphy | Urban County Coalition | Undecided | GA90 |