| Melissa Speed | AFSCME Iowa Council 61 | Opposing | GA90 |
| Tyler Raygor | Americans For Prosperity | Supporting | GA90 |
| Sydney Gangestad | CHILDSERVE | Undecided | GA90 |
| Tim Coonan | CHILDSERVE | Undecided | GA90 |
| Anne Discher | Common Good Iowa | Opposing | GA90 |
| Mike Owen | Common Good Iowa | Opposing | GA90 |
| Sean Finn | Common Good Iowa | Opposing | GA90 |
| Sheila Hansen | Common Good Iowa | Opposing | GA90 |
| Connie Ryan | Interfaith Alliance of Iowa Action Fund | Opposing | GA90 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| John Davis | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Supporting | GA90 |
| Mike Rozenboom | Iowa Bankers Association | Supporting | GA90 |
| Sharon Presnall | Iowa Bankers Association | Supporting | GA90 |
| Tom Chapman | Iowa Catholic Conference | Opposing | GA90 |
| James Kersten | Iowa Central Community College | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA90 |
| Deanna Triplett | Iowa Economic Development Authority | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA90 |
| Alan Kemp | Iowa League of Cities | Undecided | GA90 |
| Daniel Stalder | Iowa League of Cities | Undecided | GA90 |
| Robert Palmer | Iowa League of Cities | Undecided | GA90 |
| Melissa Peterson | Iowa State Education Association | Opposing | GA90 |
| Morgan Miller | Iowa State Education Association | Opposing | GA90 |
| Tom Sands | Iowa Taxpayers Association | Supporting | GA90 |
| David Adelman | Iowa Water Land Legacy Coalition | Undecided | GA90 |
| Frank Chiodo | Iowa Water Land Legacy Coalition | Undecided | GA90 |
| Matt Hinch | Iowa Water Land Legacy Coalition | Undecided | GA90 |
| Paige Thorson | Iowa Water Land Legacy Coalition | Undecided | GA90 |
| Sara Allen | Iowa Water Land Legacy Coalition | Undecided | GA90 |
| Andy Conlin | Iowans for Tax Relief | Supporting | GA90 |
| Chris Hagenow | Iowans for Tax Relief | Supporting | GA90 |
| Jake Highfill | Iowans for Tax Relief | Supporting | GA90 |
| Tony Phillips | Iowans for Tax Relief | Supporting | GA90 |
| Sydney Gangestad | Mindspring Mental Health Alliance | Undecided | GA90 |
| Tim Coonan | Mindspring Mental Health Alliance | Undecided | GA90 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA90 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Opposing | GA90 |
| Mike Heller | Waste Management, Inc. | Undecided | GA90 |