| Melissa Speed | AFSCME Iowa Council 61 | Opposing | GA90 |
| Melissa Speed | AFSCME Iowa Council 61 | Undecided | GA90 |
| Jeremy Vos | Homeschool Iowa | Supporting | GA90 |
| Nick Laning | IBEW Iowa State Conference | Opposing | GA90 |
| Nick Laning | IBEW Iowa State Conference | Undecided | GA90 |
| Threase Harms | IBEW Iowa State Conference | Opposing | GA90 |
| Threase Harms | IBEW Iowa State Conference | Undecided | GA90 |
| Jefferson Fink | Iowa Association of Building Officials | Undecided | GA90 |
| Jim Obradovich | Iowa Association of Building Officials | Undecided | GA90 |
| Victoria Sinclair | Iowa Association of Building Officials | Undecided | GA90 |
| Eric Goranson | Iowa Association of Christian Schools | Supporting | GA90 |
| Cyndi Pederson | Iowa Association of Professional Fire Chiefs | Opposing | GA90 |
| Jason Benell | Iowa Atheists and Freethinkers | Opposing | GA90 |
| Robert Cook | Iowa Atheists and Freethinkers | Opposing | GA90 |
| Brad Cranston | Iowa Baptists For Biblical Values | Supporting | GA90 |
| Angela Caulk | Iowa Chapter, American Institute of Architects | Opposing | GA90 |
| Angela Caulk | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Christian Frankl | Iowa Chapter, American Institute of Architects | Opposing | GA90 |
| Christian Frankl | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Logan Murray | Iowa Chapter, American Institute of Architects | Opposing | GA90 |
| Logan Murray | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Noah Tabor | Iowa Chapter, American Institute of Architects | Opposing | GA90 |
| Noah Tabor | Iowa Chapter, American Institute of Architects | Undecided | GA90 |
| Carrie Malone | Iowa Department of Health and Human Services | Undecided | GA90 |
| Nick Crawford | Iowa Department of Health and Human Services | Undecided | GA90 |
| Sonya Streit | Iowa Department of Health and Human Services | Undecided | GA90 |
| Sara Throener | Iowa Department of Inspections, Appeals, and Licensing | Undecided | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Opposing | GA90 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Undecided | GA90 |
| Cyndi Pederson | Iowa Fire Chiefs Association | Opposing | GA90 |
| Cyndi Pederson | Iowa Firefighters Association (IFA) | Opposing | GA90 |
| Elizabeth Crimmings | Iowa Firefighters Association (IFA) | Opposing | GA90 |
| John Pederson | Iowa Firefighters Association (IFA) | Opposing | GA90 |
| Christopher Rants | Iowa Professional Fire Fighters | Opposing | GA90 |
| John Cacciatore | Iowa Professional Fire Fighters | Opposing | GA90 |
| Lon Anderson | Iowa Professional Fire Fighters | Opposing | GA90 |
| Jon Murphy | Iowa State Building and Construction Trades | Undecided | GA90 |
| Melissa Peterson | Iowa State Education Association | Undecided | GA90 |
| Morgan Miller | Iowa State Education Association | Undecided | GA90 |
| Dane Schumann | North Central States Regional Council of Carpenters | Undecided | GA90 |
| Nathaniel Arnold | Professional Educators of Iowa | Undecided | GA90 |
| Dave Daughton | Rural School Advocates of Iowa | Opposing | GA90 |
| Margaret Buckton | Rural School Advocates of Iowa | Opposing | GA90 |
| Dave Daughton | School Administrators of Iowa | Opposing | GA90 |
| Chuck Hurley | The Family Leader | Supporting | GA90 |
| Danny Carroll | The Family Leader | Supporting | GA90 |
| Ryan Benn | The Family Leader | Supporting | GA90 |
| Chuck Hurley | The Family Leader Foundation | Supporting | GA90 |
| Danny Carroll | The Family Leader Foundation | Supporting | GA90 |
| Denise Bubeck | The Family Leader Foundation | Supporting | GA90 |
| Greg Baker | The Family Leader Foundation | Supporting | GA90 |
| Noah Meyers | The Family Leader Foundation | Supporting | GA90 |
| Ryan Benn | The Family Leader Foundation | Supporting | GA90 |
| Margaret Buckton | Urban Education Network of Iowa | Opposing | GA90 |