| David Scott | American Council of Engineering Companies | Opposing | GA89 |
| Carolann Jensen | Board of Regents, State of Iowa | Undecided | GA89 |
| Jennifer Harbison | Board of Regents, State of Iowa | Undecided | GA89 |
| Keith Saunders | Board of Regents, State of Iowa | Undecided | GA89 |
| Mary Braun | Board of Regents, State of Iowa | Undecided | GA89 |
| Drew Kamp | Council Bluffs Chamber of Commerce | Undecided | GA89 |
| Christopher Rants | Design Build Institute of America - Mid-American Region c/o MultiState Associate | Supporting | GA89 |
| John Cacciatore | Design Build Institute of America - Mid-American Region c/o MultiState Associate | Supporting | GA89 |
| Ryan Sempf | Dubuque Area Chamber of Commerce | Undecided | GA89 |
| Andrea Woodard | Greater Des Moines Partnership | Undecided | GA89 |
| Brad Epperly | Greater Des Moines Partnership | Undecided | GA89 |
| Dustin Miller | Greater Des Moines Partnership | Undecided | GA89 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Undecided | GA89 |
| Nick Laning | IBEW Iowa State Conference | Supporting | GA89 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA89 |
| Threase Harms | IBEW Iowa State Conference | Supporting | GA89 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA89 |
| Michael Triplett | Iowa Alliance of Surety Companies | Undecided | GA89 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA89 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA89 |
| Paula Dierenfeld | Iowa Chapter, American Institute of Architects | Undecided | GA89 |
| Doug Struyk | Iowa Competitive Bidding Alliance, Inc. | Opposing | GA89 |
| Jennifer Dorman | Iowa Competitive Bidding Alliance, Inc. | Opposing | GA89 |
| Jim Carney | Iowa Competitive Bidding Alliance, Inc. | Opposing | GA89 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Supporting | GA89 |
| Erin Cubit | Iowa Hospital Association | Undecided | GA89 |
| J. Norris | Iowa Hospital Association | Undecided | GA89 |
| Kim Murphy | Iowa Hospital Association | Undecided | GA89 |
| Maureen Keehnle | Iowa Hospital Association | Undecided | GA89 |
| Nicole Proesch | Iowa Hospital Association | Undecided | GA89 |
| Michael Gronstal | Iowa State Building and Construction Trades | Supporting | GA89 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Supporting | GA89 |
| Christopher Rants | Plumbers and Steam Fitters Local 33 | Supporting | GA89 |
| John Cacciatore | Plumbers and Steam Fitters Local 33 | Supporting | GA89 |
| Jim Romar | Teamsters Local 238 | Supporting | GA89 |
| Kelli Harrison | UAW Region 4 | Supporting | GA89 |
| Karl Schilling | United Professionals/UE | Supporting | GA89 |