| Sandra Conlin | Associated Builders & Contractors of Iowa | Supporting | GA91 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA91 |
| Jim Obradovich | Faith Baptist Bible College | Undecided | GA91 |
| Jefferson Fink | Greater Des Moines Heating & Cooling Association | Undecided | GA91 |
| Jim Obradovich | Greater Des Moines Heating & Cooling Association | Undecided | GA91 |
| James Piazza III | Heavy Highway Contractors Association | Undecided | GA91 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA91 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA91 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA91 |
| John Davis | Iowa Association of Business and Industry (ABI) | Undecided | GA91 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA91 |
| Brad Epperly | Iowa Business Council | Undecided | GA91 |
| Casey Nickel | Iowa Business Council | Undecided | GA91 |
| Dustin Miller | Iowa Business Council | Undecided | GA91 |
| Joe Murphy | Iowa Business Council | Undecided | GA91 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA91 |
| Casey Nickel | Iowa Chamber Alliance | Undecided | GA91 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA91 |
| Sara Throener | Iowa Department of Inspections, Appeals, and Licensing | Undecided | GA91 |
| Sarah Vanderploeg | Iowa Department of Inspections, Appeals, and Licensing | Undecided | GA91 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Undecided | GA91 |
| Jon Murphy | Iowa State Building and Construction Trades | Undecided | GA91 |
| Tom Cope | Iowa State Building and Construction Trades | Undecided | GA91 |
| Christopher Rants | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA91 |
| Justin Hupfer | Mechanical Contractors Association of Iowa (MCAI) | Undecided | GA91 |
| Dane Schumann | Mid-American Carpenters Regional Council | Opposing | GA91 |
| Dane Schumann | Mid-American Carpenters Regional Council | Undecided | GA91 |
| Christopher Rants | NECA - Iowa (NEC) | Undecided | GA91 |
| Jake Friedrichsen | NECA - Iowa (NEC) | Undecided | GA91 |
| Justin Hupfer | NECA - Iowa (NEC) | Undecided | GA91 |
| Christopher Rants | Plumbers and Steam Fitters Local 33 | Undecided | GA91 |
| Jake Friedrichsen | Plumbers and Steam Fitters Local 33 | Undecided | GA91 |
| Eric Goranson | Plumbing Heating & Cooling Contractors of IA | Supporting | GA91 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA91 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA91 |
| David Adelman | Sheet Metal Contractors of Iowa | Undecided | GA91 |
| Frank Chiodo | Sheet Metal Contractors of Iowa | Undecided | GA91 |
| Matt Hinch | Sheet Metal Contractors of Iowa | Undecided | GA91 |
| Paige Thorson | Sheet Metal Contractors of Iowa | Undecided | GA91 |
| Sara Allen | Sheet Metal Contractors of Iowa | Undecided | GA91 |