| Dane Schumann | Grow Clinton County | Undecided | GA87 |
| Emily Hockins | Grow Clinton County | Undecided | GA87 |
| Threase Harms | Grow Clinton County | Undecided | GA87 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Undecided | GA87 |
| Jennifer Kingland | Iowa Association of Realtors | Undecided | GA87 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA87 |
| Doug Struyk | Iowa Competitive Bidding Alliance, Inc. | Supporting | GA87 |
| Jennifer Dorman | Iowa Competitive Bidding Alliance, Inc. | Supporting | GA87 |
| Jim Carney | Iowa Competitive Bidding Alliance, Inc. | Supporting | GA87 |
| Doug Struyk | Iowa Drainage District Association | Supporting | GA87 |
| Jennifer Dorman | Iowa Drainage District Association | Supporting | GA87 |
| Jim Carney | Iowa Drainage District Association | Supporting | GA87 |
| John Torbert | Iowa Drainage District Association | Supporting | GA87 |
| Mona Bond | Iowa Drainage District Association | Supporting | GA87 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA87 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA87 |
| Kristi Harshbarger | Iowa State Association of Counties | Supporting | GA87 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA87 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA87 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA87 |
| William Peterson | Iowa State Association of Counties | Supporting | GA87 |
| William Peterson | Iowa State Association of Counties | Undecided | GA87 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA87 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA87 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Supporting | GA87 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA87 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA87 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA87 |
| William Peterson | Iowa State Association of County Supervisors | Supporting | GA87 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA87 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA87 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA87 |
| Jim Carney | Iowa State Bar Association | Undecided | GA87 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA87 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA87 |