| Courtney Craig | 3M Company and its affiliates | Undecided | GA88 |
| Robert Weiser | 3M Company and its affiliates | Undecided | GA88 |
| Morgan Miller | AFSCME Iowa Council 61 | Undecided | GA88 |
| Daniel Zeno | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA88 |
| Mark Stringer | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA88 |
| Pete McRoberts | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA88 |
| Rita Bettis Austen | American Civil Liberties Union of Iowa (ACLU-IA) | Opposing | GA88 |
| Courtney Craig | Annett Holdings | Undecided | GA88 |
| Robert Weiser | Annett Holdings | Undecided | GA88 |
| Kate Walton | Arconic (Formerly Alcoa) | Undecided | GA88 |
| Matt Eide | Arconic (Formerly Alcoa) | Undecided | GA88 |
| Scott Newhard | Associated General Contractors of Iowa | Supporting | GA88 |
| Courtney Craig | CRST International | Undecided | GA88 |
| Robert Weiser | CRST International | Undecided | GA88 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA88 |
| Thomas Jochum | Central Iowa Building Construction Trades Council | Opposing | GA88 |
| Dale Woolery | Governors Office of Drug Control Policy | Undecided | GA88 |
| Susie Sher | Governors Office of Drug Control Policy | Undecided | GA88 |
| Thomas Jochum | International Union of Operating Engineers-Local 234 | Opposing | GA88 |
| Brad Lint | Iowa Association for Justice | Opposing | GA88 |
| Lisa Davis-Cook | Iowa Association for Justice | Opposing | GA88 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Supporting | GA88 |
| John Davis | Iowa Association of Business and Industry (ABI) | Supporting | GA88 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Supporting | GA88 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Supporting | GA88 |
| Emily Piper | Iowa Association of School Boards | Undecided | GA88 |
| Phil Jeneary | Iowa Association of School Boards | Undecided | GA88 |
| Amy Campbell | Iowa Behavioral Health Association (IBHA) | Undecided | GA88 |
| Craig Patterson | Iowa Behavioral Health Association (IBHA) | Undecided | GA88 |
| James Kersten | Iowa Central Community College | Undecided | GA88 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA88 |
| Susan Cameron Daemen | Iowa County Attorneys Association | Undecided | GA88 |
| Charlie Wishman | Iowa Federation of Labor, AFL-CIO | Opposing | GA88 |
| Charlie Wishman | Iowa Federation of Labor, AFL-CIO | Undecided | GA88 |
| Julianne Frosolone | Iowa Federation of Labor, AFL-CIO | Undecided | GA88 |
| Alan Kemp | Iowa League of Cities | Undecided | GA88 |
| Daniel Stalder | Iowa League of Cities | Undecided | GA88 |
| Robert Palmer | Iowa League of Cities | Undecided | GA88 |
| David Scott | Iowa Motor Truck Association | Supporting | GA88 |
| Jim Henter | Iowa Retail Federation | Undecided | GA88 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA88 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA88 |
| Jim Carney | Iowa State Bar Association | Undecided | GA88 |
| Michael Gronstal | Iowa State Building and Construction Trades | Opposing | GA88 |
| Michael Gronstal | Iowa State Building and Construction Trades | Undecided | GA88 |
| Dylan Gramlich | Laborers International Union of North America | Opposing | GA88 |
| Ben Hammes | Master Builders of Iowa | Supporting | GA88 |
| Julie Smith | Master Builders of Iowa | Supporting | GA88 |
| Brian Johnson | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA88 |
| Christopher Rants | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA88 |
| Justin Hupfer | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA88 |
| Brian Johnson | NECA - Iowa (NEC) | Undecided | GA88 |
| Christopher Rants | NECA - Iowa (NEC) | Undecided | GA88 |
| Justin Hupfer | NECA - Iowa (NEC) | Undecided | GA88 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA88 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Undecided | GA88 |
| Brian Johnson | NextEra Energy | Undecided | GA88 |
| Christopher Rants | NextEra Energy | Undecided | GA88 |
| Justin Hupfer | NextEra Energy | Undecided | GA88 |
| Charlotte Eby | North Central States Regional Council of Carpenters | Undecided | GA88 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Undecided | GA88 |
| Taylor McDonald | North Central States Regional Council of Carpenters | Undecided | GA88 |
| John Cacciatore | Plumbers and Steam Fitters Local 33 | Undecided | GA88 |
| Amy Campbell | Polk County - Board of Supervisors | Supporting | GA88 |
| Brian Johnson | Polk County - Board of Supervisors | Undecided | GA88 |
| Jim Romar | Teamsters Local 238 | Opposing | GA88 |
| Brian Johnson | U.S. Cellular | Undecided | GA88 |
| Christopher Rants | U.S. Cellular | Undecided | GA88 |
| Justin Hupfer | U.S. Cellular | Undecided | GA88 |