| Drew Kamp | Ames Chamber of Commerce | Undecided | GA88 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA88 |
| Dane Schumann | Des Moines Water Works | Undecided | GA88 |
| Maddie Wilcox | Des Moines Water Works | Undecided | GA88 |
| Threase Harms | Des Moines Water Works | Undecided | GA88 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Drew Wynes | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA88 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA88 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA88 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA88 |
| John Stineman | Iowa Chamber Alliance | Undecided | GA88 |
| Katie Graham | Iowa Chamber Alliance | Undecided | GA88 |
| Paula Dierenfeld | Iowa Chamber Alliance | Undecided | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA88 |
| Mike Heller | Iowa Conservation Alliance | Supporting | GA88 |
| Mike Heller | Iowa Conservation Alliance | Undecided | GA88 |
| Paula Feltner | Iowa Conservation Alliance | Supporting | GA88 |
| Paula Feltner | Iowa Conservation Alliance | Undecided | GA88 |
| Adam Schnieders | Iowa Dept. of Natural Resources | Supporting | GA88 |
| Doug Struyk | Iowa Drainage District Association | Undecided | GA88 |
| Jennifer Dorman | Iowa Drainage District Association | Undecided | GA88 |
| Jim Carney | Iowa Drainage District Association | Undecided | GA88 |
| John Torbert | Iowa Drainage District Association | Undecided | GA88 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA88 |
| Dane Schumann | Iowa Environmental Council | Undecided | GA88 |
| Maddie Wilcox | Iowa Environmental Council | Undecided | GA88 |
| Threase Harms | Iowa Environmental Council | Undecided | GA88 |
| Don Petersen | Iowa Farm Bureau Federation | Undecided | GA88 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Undecided | GA88 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Undecided | GA88 |
| Dane Schumann | Iowa Rivers Revival | Undecided | GA88 |
| Maddie Wilcox | Iowa Rivers Revival | Undecided | GA88 |
| Threase Harms | Iowa Rivers Revival | Undecided | GA88 |
| Emily Piper | Iowa Rural Water Association | Undecided | GA88 |
| Brad Epperly | res | Undecided | GA88 |
| Dustin Miller | res | Undecided | GA88 |
| Katie Graham | res | Undecided | GA88 |
| Paula Dierenfeld | res | Undecided | GA88 |