| David Scott | American Council of Engineering Companies | Supporting | GA88 |
| David Scott | American Council of Engineering Companies | Undecided | GA88 |
| Drew Kamp | Ames Chamber of Commerce | Undecided | GA88 |
| Scott Newhard | Associated General Contractors of Iowa | Supporting | GA88 |
| Keith Saunders | Board of Regents, State of Iowa | Opposing | GA88 |
| Kristin Bauer | Board of Regents, State of Iowa | Opposing | GA88 |
| Mark Braun | Board of Regents, State of Iowa | Opposing | GA88 |
| Mary Braun | Board of Regents, State of Iowa | Opposing | GA88 |
| Thomas Jochum | Central Iowa Building Construction Trades Council | Opposing | GA88 |
| Christopher Rants | Design Build Institute of America - Mid-American Region c/o MultiState Associate | Opposing | GA88 |
| John Cacciatore | Design Build Institute of America - Mid-American Region c/o MultiState Associate | Opposing | GA88 |
| Andrea Woodard | Greater Des Moines Partnership | Undecided | GA88 |
| Brad Epperly | Greater Des Moines Partnership | Undecided | GA88 |
| Dustin Miller | Greater Des Moines Partnership | Undecided | GA88 |
| Joe Murphy | Greater Des Moines Partnership | Undecided | GA88 |
| Katie Graham | Greater Des Moines Partnership | Undecided | GA88 |
| Paula Dierenfeld | Greater Des Moines Partnership | Undecided | GA88 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Opposing | GA88 |
| Jay Iverson | Home Builders Association of Iowa | Undecided | GA88 |
| Dane Schumann | IBEW Iowa State Conference | Opposing | GA88 |
| Dane Schumann | IBEW Iowa State Conference | Undecided | GA88 |
| Maddie Wilcox | IBEW Iowa State Conference | Opposing | GA88 |
| Maddie Wilcox | IBEW Iowa State Conference | Undecided | GA88 |
| Threase Harms | IBEW Iowa State Conference | Opposing | GA88 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA88 |
| Thomas Jochum | International Union of Operating Engineers-Local 234 | Opposing | GA88 |
| Emily Piper | Iowa Association of School Boards | Opposing | GA88 |
| Emily Piper | Iowa Association of School Boards | Undecided | GA88 |
| Phil Jeneary | Iowa Association of School Boards | Opposing | GA88 |
| Phil Jeneary | Iowa Association of School Boards | Undecided | GA88 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA88 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA88 |
| John Stineman | Iowa Chamber Alliance | Undecided | GA88 |
| Katie Graham | Iowa Chamber Alliance | Undecided | GA88 |
| Paula Dierenfeld | Iowa Chamber Alliance | Undecided | GA88 |
| Brad Epperly | Iowa Chapter, American Institute of Architects | Undecided | GA88 |
| Dustin Miller | Iowa Chapter, American Institute of Architects | Undecided | GA88 |
| Katie Graham | Iowa Chapter, American Institute of Architects | Undecided | GA88 |
| Paula Dierenfeld | Iowa Chapter, American Institute of Architects | Undecided | GA88 |
| Doug Struyk | Iowa Competitive Bidding Alliance, Inc. | Supporting | GA88 |
| Jennifer Dorman | Iowa Competitive Bidding Alliance, Inc. | Supporting | GA88 |
| Jim Carney | Iowa Competitive Bidding Alliance, Inc. | Supporting | GA88 |
| David Scott | Iowa Engineering Society | Undecided | GA88 |
| Charlie Wishman | Iowa Federation of Labor, AFL-CIO | Opposing | GA88 |
| Angela Davis | Iowa Lumber 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 | Opposing | GA88 |
| Chad Kleppe | Master Builders of Iowa | Opposing | GA88 |
| Julie Smith | Master Builders of Iowa | Opposing | GA88 |
| Brian Johnson | Mechanical Contractors Association of Iowa (MCAI) | Opposing | GA88 |
| Craig Walter | Mechanical Contractors Association of Iowa (MCAI) | Opposing | GA88 |
| Brian Johnson | NECA - Iowa (NEC) | Opposing | GA88 |
| Craig Walter | NECA - Iowa (NEC) | Opposing | GA88 |
| Charlotte Eby | North Central States Regional Council of Carpenters | Opposing | GA88 |
| Felicia Hilton | North Central States Regional Council of Carpenters | Opposing | GA88 |
| Taylor McDonald | North Central States Regional Council of Carpenters | Opposing | GA88 |
| Christopher Rants | Plumbers and Steam Fitters Local 33 | Opposing | GA88 |
| John Cacciatore | Plumbers and Steam Fitters Local 33 | Opposing | GA88 |
| Chris Smith | SMART Sheet Metal Local 263 | Opposing | GA88 |
| Chris Smith | SMART Sheet Metal Local 45 | Opposing | GA88 |
| Chris Smith | SMART Sheet Metal Local 91 | Opposing | GA88 |
| David Adelman | Sheet Metal Contractors of Iowa | Opposing | GA88 |
| David Adelman | Sheet Metal Contractors of Iowa | Undecided | GA88 |
| Frank Chiodo | Sheet Metal Contractors of Iowa | Opposing | GA88 |
| Frank Chiodo | Sheet Metal Contractors of Iowa | Undecided | GA88 |
| Matt Hinch | Sheet Metal Contractors of Iowa | Opposing | GA88 |
| Matt Hinch | Sheet Metal Contractors of Iowa | Undecided | GA88 |
| Sara Allen | Sheet Metal Contractors of Iowa | Opposing | GA88 |
| Sara Allen | Sheet Metal Contractors of Iowa | Undecided | GA88 |
| BRITTANY LUMLEY | Weitz Company | Opposing | GA88 |
| Charlotte Eby | Weitz Company | Opposing | GA88 |
| Jeffrey Boeyink | Weitz Company | Opposing | GA88 |
| Taylor McDonald | Weitz Company | Opposing | GA88 |