| Drew Klein | Americans For Prosperity | Supporting | GA88 |
| Tyler Raygor | Americans For Prosperity | Supporting | GA88 |
| Tim Reilly | Department of Revenue | Undecided | GA88 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA88 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA88 |
| Jeff Smith | Iowa Corn Growers Association | Supporting | GA88 |
| Jerry Fitzgerald | Iowa Corn Growers Association | Supporting | GA88 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Supporting | GA88 |
| Matt Fitzgerald | Iowa Corn Growers Association | Supporting | GA88 |
| Mindy Poldberg | Iowa Corn Growers Association | Supporting | 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 |
| 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 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA88 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA88 |
| Jim Carney | Iowa State Bar Association | Undecided | GA88 |
| Bradley Hudson | Iowa State Education Association | Opposing | GA88 |
| Melissa Peterson | Iowa State Education Association | Opposing | GA88 |
| Robert Hartwig | Iowa Trust Association | Undecided | GA88 |
| Sharon Presnall | Iowa Trust Association | Undecided | GA88 |
| Ernie Adkison | Iowans for Tax Relief | Supporting | GA88 |
| Margaret Buckton | Rural School Advocates of Iowa | Opposing | GA88 |
| Sydney Gangestad | The Iowa Academy of Trust and Estate Counsel | Undecided | GA88 |
| Sydney Gangestad | The Iowa Academy of Trust and Estate Counsel | Supporting | GA88 |
| Tim Coonan | The Iowa Academy of Trust and Estate Counsel | Undecided | GA88 |
| Tim Coonan | The Iowa Academy of Trust and Estate Counsel | Supporting | GA88 |
| Margaret Buckton | Urban Education Network of Iowa | Opposing | GA88 |