| David Scott | American Council of Engineering Companies | Undecided | GA88 |
| Steven Van Steenhuyse | American Planning Association Iowa Chapter | Undecided | GA88 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA88 |
| Kate Walton | City of Cedar Falls | Undecided | GA88 |
| Matt Eide | City of Cedar Falls | Undecided | GA88 |
| Gary Grant | City of Cedar Rapids | Opposing | GA88 |
| Gary Grant | City of Cedar Rapids | Withdrawn | GA88 |
| Gary Grant | City of Cedar Rapids | Undecided | GA88 |
| Larry Murphy | City of Cedar Rapids | Opposing | GA88 |
| Larry Murphy | City of Cedar Rapids | Withdrawn | GA88 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA88 |
| Meghan Malloy | City of Cedar Rapids | Opposing | GA88 |
| Meghan Malloy | City of Cedar Rapids | Withdrawn | GA88 |
| Meghan Malloy | City of Cedar Rapids | Undecided | GA88 |
| Dylan Mullenix | Des Moines Area Metropolitan Planning Organization | Opposing | GA88 |
| Dane Schumann | Grow Clinton County | Undecided | GA88 |
| Maddie Wilcox | Grow Clinton County | Undecided | GA88 |
| Threase Harms | Grow Clinton County | Undecided | GA88 |
| Susan Fenton | Iowa Dept. of Transportation | Undecided | GA88 |
| Alan Kemp | Iowa League of Cities | Undecided | GA88 |
| Daniel Stalder | Iowa League of Cities | Undecided | GA88 |
| Robert Palmer | Iowa League of Cities | Undecided | GA88 |
| David Scott | Iowa Motor Truck Association | 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 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA88 |
| Gary Grant | Linn County Board of Supervisors | Withdrawn | GA88 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Withdrawn | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Withdrawn | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Undecided | GA88 |
| Gary Grant | Urban County Coalition | Undecided | GA88 |
| Larry Murphy | Urban County Coalition | Undecided | GA88 |
| Meghan Malloy | Urban County Coalition | Undecided | GA88 |