| Dustin Rush | Americans For Prosperity | Supporting | GA91 |
| Tyler Raygor | Americans For Prosperity | Supporting | GA91 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA91 |
| Gary Grant | City of Cedar Rapids | Undecided | GA91 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA91 |
| Brad Epperly | City of Marion | Undecided | GA91 |
| Casey Nickel | City of Marion | Undecided | GA91 |
| Dustin Miller | City of Marion | Undecided | GA91 |
| Doug Struyk | City of Waukee | Undecided | GA91 |
| Jennifer Dorman | City of Waukee | Undecided | GA91 |
| Jim Carney | City of Waukee | Undecided | GA91 |
| Emily Piper | Iowa Association of School Boards | Undecided | GA91 |
| Michelle Johnson | Iowa Association of School Boards | Undecided | GA91 |
| Kelly Meyers | Iowa County Attorneys Association | Undecided | GA91 |
| Tom Ferguson | Iowa County Attorneys Association | Undecided | GA91 |
| Census Lo-liyong | Iowa County Recorders Association | Undecided | GA91 |
| Erika Eckley | Iowa Ethics and Campaign Disclosure Board | Undecided | GA91 |
| Kimberly Murphy | Iowa Ethics and Campaign Disclosure Board | Undecided | GA91 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA91 |
| Matt Gronewald | Iowa Farm Bureau Federation | Supporting | GA91 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA91 |
| Chelsea Hoye | Iowa League of Cities | Opposing | GA91 |
| Cody Carlson | Iowa League of Cities | Opposing | GA91 |
| Larry Murphy | Iowa Police Chief Association (FKA Iowa Police Executive Forum) | Undecided | GA91 |
| Brad Epperly | Iowa State Association of Assessors | Undecided | GA91 |
| Casey Nickel | Iowa State Association of Assessors | Undecided | GA91 |
| Dustin Miller | Iowa State Association of Assessors | Undecided | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Undecided | GA91 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA91 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA91 |
| Andy Conlin | Iowans for Tax Relief | Supporting | GA91 |
| Chris Hagenow | Iowans for Tax Relief | Supporting | GA91 |
| Jake Highfill | Iowans for Tax Relief | Supporting | GA91 |
| Tony Phillips | Iowans for Tax Relief | Supporting | GA91 |
| Kurtis Bower | Kurtis Bower | Opposing | GA91 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA91 |
| Gary Grant | Linn County Board of Supervisors | Withdrawn | GA91 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA91 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA91 |
| Larry Murphy | Linn County Board of Supervisors | Withdrawn | GA91 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA91 |
| Kellie Paschke | Marion County Board of Supervisors | Undecided | GA91 |
| Kelly Meyers | Marion County Board of Supervisors | Undecided | GA91 |
| Dave Daughton | Rural School Advocates of Iowa | Undecided | GA91 |
| Margaret Buckton | Rural School Advocates of Iowa | Undecided | GA91 |
| Dave Daughton | School Administrators of Iowa | Undecided | GA91 |
| Gary Grant | Urban County Coalition | Undecided | GA91 |
| Larry Murphy | Urban County Coalition | Undecided | GA91 |
| Margaret Buckton | Urban Education Network of Iowa | Opposing | GA91 |
| John Strathman | VALOR Iowa | Supporting | GA91 |