| David Adelman | Associated General Contractors of Iowa | Supporting | GA88 |
| Frank Chiodo | Associated General Contractors of Iowa | Supporting | GA88 |
| Matt Hinch | Associated General Contractors of Iowa | Supporting | GA88 |
| Scott Newhard | Associated General Contractors of Iowa | Supporting | GA88 |
| Brad Epperly | BNSF Railway Co. | Opposing | GA88 |
| Dustin Miller | BNSF Railway Co. | Opposing | GA88 |
| Katie Graham | BNSF Railway Co. | Opposing | GA88 |
| Paula Dierenfeld | BNSF Railway Co. | Opposing | GA88 |
| Kate Walton | CN Rail | Opposing | GA88 |
| Matt Eide | CN Rail | Opposing | GA88 |
| Gary Grant | City of Cedar Rapids | Undecided | GA88 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA88 |
| Meghan Malloy | City of Cedar Rapids | Undecided | GA88 |
| James Piazza, Jr. | Heavy Highway Contractors Association | Supporting | GA88 |
| Lyle Brehm | Iowa County Engineers Association | Opposing | GA88 |
| David Scott | Iowa Motor Truck Association | Supporting | GA88 |
| Jim Obradovich | Iowa Shortline and Regional Railroad Association | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA88 |
| William Peterson | Iowa State Association of Counties | Undecided | GA88 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA88 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA88 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA88 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA88 |
| David Adelman | Iowa Wood Industry Association | Supporting | GA88 |
| Frank Chiodo | Iowa Wood Industry Association | Supporting | GA88 |
| Matt Hinch | Iowa Wood Industry Association | Supporting | GA88 |
| Scott Newhard | Iowa Wood Industry Association | Supporting | GA88 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA88 |
| Michael Triplett | Union Pacific Railroad | Opposing | GA88 |
| Gary Grant | Urban County Coalition | Undecided | GA88 |
| Larry Murphy | Urban County Coalition | Undecided | GA88 |
| Meghan Malloy | Urban County Coalition | Undecided | GA88 |