| Mazie Stilwell | AFSCME Iowa Council 61 | Opposing | GA88 |
| Morgan Miller | AFSCME Iowa Council 61 | Opposing | GA88 |
| Drew Klein | Americans For Prosperity | Supporting | GA88 |
| Tyler Raygor | Americans For Prosperity | Supporting | GA88 |
| Jeff Smith | Broadlawns Medical Center | Undecided | GA88 |
| Jerry Fitzgerald | Broadlawns Medical Center | Undecided | GA88 |
| Maggie Smith-Fitzgerald | Broadlawns Medical Center | Undecided | GA88 |
| Matt Fitzgerald | Broadlawns Medical Center | Undecided | GA88 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA88 |
| Gary Grant | City of Cedar Rapids | Opposing | GA88 |
| Gary Grant | City of Cedar Rapids | Withdrawn | GA88 |
| Gary Grant | City of Cedar Rapids | Undecided | GA88 |
| Larry Murphy | City of Cedar Rapids | Opposing | GA88 |
| Larry Murphy | City of Cedar Rapids | Withdrawn | GA88 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA88 |
| Meghan Malloy | City of Cedar Rapids | Opposing | GA88 |
| Meghan Malloy | City of Cedar Rapids | Withdrawn | GA88 |
| Meghan Malloy | City of Cedar Rapids | Undecided | GA88 |
| Jon Murphy | City of Coralville | Opposing | GA88 |
| Tom Cope | City of Coralville | Opposing | GA88 |
| Alex Hassel | City of Des Moines | Opposing | GA88 |
| Doug Struyk | City of Des Moines | Opposing | GA88 |
| Jen Schulte | City of Des Moines | Opposing | GA88 |
| Jennifer Dorman | City of Des Moines | Opposing | GA88 |
| Jim Carney | City of Des Moines | Opposing | GA88 |
| Doug Struyk | City of Iowa City | Opposing | GA88 |
| Jennifer Dorman | City of Iowa City | Opposing | GA88 |
| Jim Carney | City of Iowa City | Opposing | GA88 |
| Doug Struyk | City of Waukee | Opposing | GA88 |
| Jennifer Dorman | City of Waukee | Opposing | GA88 |
| Jim Carney | City of Waukee | Opposing | GA88 |
| Julie Smith | City of West Des Moines | Opposing | GA88 |
| Sydney Gangestad | City of West Des Moines | Opposing | GA88 |
| Tim Coonan | City of West Des Moines | Opposing | GA88 |
| MaryNelle Trefz | Common Good Iowa | Opposing | GA88 |
| Sheila Hansen | Common Good Iowa | Opposing | GA88 |
| Tim Reilly | Department of Revenue | Undecided | 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 |
| Dane Schumann | Grow Clinton County | Opposing | GA88 |
| Maddie Wilcox | Grow Clinton County | Opposing | GA88 |
| Threase Harms | Grow Clinton County | Opposing | GA88 |
| R. Bruce Beeston | HOA Reform Coaltion | Undecided | GA88 |
| Jay Iverson | Home Builders Association of Iowa | Opposing | GA88 |
| Jay Iverson | Home Builders Association of Iowa | Undecided | GA88 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Drew Wynes | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Jon Murphy | Iowa Association of Councils of Governments | Undecided | GA88 |
| Tom Cope | Iowa Association of Councils of Governments | Undecided | GA88 |
| Amy Campbell | Iowa Association of County Conservation Boards | Opposing | GA88 |
| Craig Patterson | Iowa Association of County Conservation Boards | Opposing | GA88 |
| Jenica Lensmeyer | Iowa Bankers Association | Undecided | GA88 |
| Robert Hartwig | Iowa Bankers Association | Undecided | GA88 |
| Sharon Presnall | Iowa Bankers Association | Undecided | GA88 |
| Georgia Van Gundy | Iowa Business Council | 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 |
| Dane Schumann | Iowa Chapter of the Association of Public Safety Communications Officials (APCO) | Opposing | GA88 |
| Maddie Wilcox | Iowa Chapter of the Association of Public Safety Communications Officials (APCO) | Opposing | GA88 |
| Threase Harms | Iowa Chapter of the Association of Public Safety Communications Officials (APCO) | Opposing | GA88 |
| Dane Schumann | Iowa Chapter of the National Emergency Number Association (NENA) | Opposing | GA88 |
| Maddie Wilcox | Iowa Chapter of the National Emergency Number Association (NENA) | Opposing | GA88 |
| Threase Harms | Iowa Chapter of the National Emergency Number Association (NENA) | Opposing | GA88 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA88 |
| Susan Cameron Daemen | Iowa County Attorneys Association | Undecided | GA88 |
| Dane Schumann | Iowa Emergency Management Association | Opposing | GA88 |
| Maddie Wilcox | Iowa Emergency Management Association | Opposing | GA88 |
| Threase Harms | Iowa Emergency Management Association | Opposing | GA88 |
| Don Petersen | Iowa Farm Bureau Federation | Supporting | GA88 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA88 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA88 |
| Charlie Wishman | Iowa Federation of Labor, AFL-CIO | Opposing | GA88 |
| John Benson | Iowa Homeland Security & Emergency Management Div. | Undecided | GA88 |
| Erika Eckley | Iowa Hospital Association | Undecided | GA88 |
| Erin Cubit | Iowa Hospital Association | Undecided | GA88 |
| J. Norris | Iowa Hospital Association | Undecided | GA88 |
| Kim Murphy | Iowa Hospital Association | Undecided | GA88 |
| Maureen Keehnle | Iowa Hospital Association | Undecided | GA88 |
| Alan Kemp | Iowa League of Cities | Opposing | GA88 |
| Daniel Stalder | Iowa League of Cities | Opposing | GA88 |
| Matt McKinney | Iowa League of Cities | Opposing | GA88 |
| RG Schwarm | Iowa League of Cities | Opposing | GA88 |
| Robert Palmer | Iowa League of Cities | Opposing | GA88 |
| Amy Campbell | Iowa Library Association (ILA) | Opposing | GA88 |
| Craig Patterson | Iowa Library Association (ILA) | Opposing | GA88 |
| Gary Grant | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Opposing | GA88 |
| Larry Murphy | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Opposing | GA88 |
| Jim Henter | Iowa Retail Federation | Undecided | GA88 |
| Brad Epperly | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Dustin Miller | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Katie Graham | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Paula Dierenfeld | Iowa Society of Certified Public Accountants | Undecided | GA88 |
| Mike Heller | Iowa State Association of Assessors | Undecided | GA88 |
| Paula Feltner | Iowa State Association of Assessors | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA88 |
| William Peterson | Iowa State Association of Counties | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of County Auditors | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of County Auditors | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of County Auditors | Opposing | GA88 |
| William Peterson | Iowa State Association of County Auditors | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Opposing | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Opposing | GA88 |
| Bradley Hudson | Iowa State Education Association | Opposing | GA88 |
| Melissa Peterson | Iowa State Education Association | Opposing | GA88 |
| Mike Heller | Iowa State Police Association | Undecided | GA88 |
| Paula Feltner | Iowa State Police Association | Undecided | GA88 |
| Kelly Meyers | Iowa State Sheriffs' & Deputies' Association | Opposing | GA88 |
| Kelly Meyers | Iowa State Sheriffs' & Deputies' Association | Undecided | GA88 |
| Susan Cameron Daemen | Iowa State Sheriffs' & Deputies' Association | Opposing | GA88 |
| Susan Cameron Daemen | Iowa State Sheriffs' & Deputies' Association | Undecided | GA88 |
| Jennifer Kingland | Iowa Taxpayers Association | Supporting | GA88 |
| Tom Sands | Iowa Taxpayers Association | Supporting | GA88 |
| Ernie Adkison | Iowans for Tax Relief | Supporting | GA88 |
| Victoria Sinclair | Iowans for Tax Relief | Supporting | GA88 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA88 |
| Gary Grant | Linn County Board of Supervisors | Withdrawn | GA88 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Withdrawn | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Withdrawn | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA88 |
| Ben Hammes | Master Builders of Iowa | Undecided | GA88 |
| Chad Kleppe | Master Builders of Iowa | Undecided | GA88 |
| Julie Smith | Master Builders of Iowa | Undecided | GA88 |
| David Adelman | Metropolitan Coalition | Undecided | GA88 |
| Frank Chiodo | Metropolitan Coalition | Undecided | GA88 |
| Matt Hinch | Metropolitan Coalition | Undecided | GA88 |
| Sara Allen | Metropolitan Coalition | Undecided | GA88 |
| Cody Carlson | National Federation of Independent Business (NFIB /IA) | Supporting | GA88 |
| Brian Johnson | Polk County - Board of Supervisors | Undecided | GA88 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA88 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA88 |
| Gary Grant | Urban County Coalition | Opposing | GA88 |
| Gary Grant | Urban County Coalition | Withdrawn | GA88 |
| Gary Grant | Urban County Coalition | Undecided | GA88 |
| Larry Murphy | Urban County Coalition | Opposing | GA88 |
| Larry Murphy | Urban County Coalition | Withdrawn | GA88 |
| Larry Murphy | Urban County Coalition | Undecided | GA88 |
| Meghan Malloy | Urban County Coalition | Opposing | GA88 |
| Meghan Malloy | Urban County Coalition | Withdrawn | GA88 |
| Meghan Malloy | Urban County Coalition | Undecided | GA88 |
| R. Bruce Beeston | Veterans National Recovery Center | Undecided | GA88 |