| Mark Stringer | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA89 |
| Pete McRoberts | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA89 |
| Rita Bettis Austen | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA89 |
| Connie Ryan | Interfaith Alliance of Iowa Action Fund | Undecided | GA89 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA89 |
| Amber Shanahan-Fricke | Iowa Judicial Branch - Supreme Court | Undecided | GA89 |
| Caitlin Jarzen | Iowa Judicial Branch - Supreme Court | Undecided | GA89 |
| Molly Kottmeyer | Iowa Judicial Branch - Supreme Court | Undecided | GA89 |
| Robert Gast | Iowa Judicial Branch - Supreme Court | Undecided | GA89 |
| Robert Ussery | Iowa Minuteman Civil Defense Corps | Supporting | GA89 |
| Brad Epperly | Iowa Newspaper Association | Opposing | GA89 |
| Dustin Miller | Iowa Newspaper Association | Opposing | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA89 |
| William Peterson | Iowa State Association of Counties | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of County Auditors | Undecided | GA89 |
| Kristi Harshbarger | Iowa State Association of County Auditors | Undecided | GA89 |
| Lucas Beenken | Iowa State Association of County Auditors | Undecided | GA89 |
| William Peterson | Iowa State Association of County Auditors | Undecided | GA89 |
| Alan Ostergren | Kirkwood Institute | Supporting | GA89 |
| Amy Campbell | League of Women Voters of Iowa | Undecided | GA89 |
| Craig Patterson | League of Women Voters of Iowa | Undecided | GA89 |
| Gary Grant | Linn County Board of Supervisors | Withdrawn | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| Andy Conlin | Opportunity Solutions Project | Supporting | GA89 |
| Kate Walton | Runbeck Election Services, Inc. | Undecided | GA89 |
| Madeleine Bradley | Runbeck Election Services, Inc. | Undecided | GA89 |
| Matt Eide | Runbeck Election Services, Inc. | Undecided | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |