| Michael McCarthy | Iowa Alliance For Retired Americans | Undecided | GA89 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA89 |
| Matt Gronewald | Iowa Farm Bureau Federation | Supporting | GA89 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA89 |
| Peter Hird | Iowa Federation of Labor, AFL-CIO | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA89 |
| William Peterson | Iowa State Association of Counties | Opposing | GA89 |
| Jamie Cashman | Iowa State Association of County Supervisors | Opposing | GA89 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Opposing | GA89 |
| Lucas Beenken | Iowa State Association of County Supervisors | Opposing | GA89 |
| William Peterson | Iowa State Association of County Supervisors | Opposing | GA89 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA89 |
| Gary Grant | Linn County Board of Supervisors | Withdrawn | GA89 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Withdrawn | GA89 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Withdrawn | GA89 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA89 |
| Kellie Paschke | Marion County Board of Supervisors | Undecided | GA89 |
| Kelly Meyers | Marion County Board of Supervisors | Undecided | GA89 |
| Logan Murray | Marion County Board of Supervisors | Undecided | GA89 |
| Troy Skinner | Marion County Board of Supervisors | Undecided | GA89 |
| Amy Campbell | Polk County - Board of Supervisors | Undecided | GA89 |
| Craig Patterson | Polk County - Board of Supervisors | Undecided | GA89 |
| Sydney Gangestad | Polk County - Board of Supervisors | Undecided | GA89 |
| Tim Coonan | Polk County - Board of Supervisors | Undecided | GA89 |
| Gary Grant | Urban County Coalition | Opposing | GA89 |
| Gary Grant | Urban County Coalition | Withdrawn | GA89 |
| Gary Grant | Urban County Coalition | Undecided | GA89 |
| Larry Murphy | Urban County Coalition | Opposing | GA89 |
| Larry Murphy | Urban County Coalition | Withdrawn | GA89 |
| Larry Murphy | Urban County Coalition | Undecided | GA89 |
| Meghan Malloy | Urban County Coalition | Opposing | GA89 |
| Meghan Malloy | Urban County Coalition | Withdrawn | GA89 |
| Meghan Malloy | Urban County Coalition | Undecided | GA89 |