| Jeff Smith | Agribusiness Association of Iowa | Undecided | GA89 |
| Jerry Fitzgerald | Agribusiness Association of Iowa | Undecided | GA89 |
| Maggie Smith-Fitzgerald | Agribusiness Association of Iowa | Undecided | GA89 |
| Matt Fitzgerald | Agribusiness Association of Iowa | Undecided | GA89 |
| Christopher Rants | Center for Rural Affairs | Supporting | GA89 |
| Christopher Rants | Center for Rural Affairs | Undecided | GA89 |
| Cody Smith | Center for Rural Affairs | Supporting | GA89 |
| Cody Smith | Center for Rural Affairs | Undecided | GA89 |
| John Cacciatore | Center for Rural Affairs | Supporting | GA89 |
| John Cacciatore | Center for Rural Affairs | Undecided | GA89 |
| Jim Obradovich | Conservation Districts of Iowa | Supporting | GA89 |
| Robert Mulqueen | Conservation Districts of Iowa | Supporting | GA89 |
| Drew Kamp | Council Bluffs Chamber of Commerce | Undecided | GA89 |
| Nick Laning | Des Moines Water Works | Undecided | GA89 |
| Threase Harms | Des Moines Water Works | Undecided | GA89 |
| Marc Beltrame | Ducks Unlimited, Inc. | Undecided | GA89 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA89 |
| Josh Mandelbaum | Environmental Law and Policy Center | Supporting | GA89 |
| Steve Falck | Environmental Law and Policy Center | Undecided | GA89 |
| Steve Falck | Environmental Law and Policy Center | Supporting | GA89 |
| Andrea Woodard | Greater Des Moines Partnership | Undecided | GA89 |
| Brad Epperly | Greater Des Moines Partnership | Undecided | GA89 |
| Dustin Miller | Greater Des Moines Partnership | Undecided | GA89 |
| Alex Cutchey | Iowa Association of Municipal Utilities | Undecided | GA89 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA89 |
| Kelly Meyers | Iowa Cattlemen's Association | Undecided | GA89 |
| Logan Murray | Iowa Cattlemen's Association | Undecided | GA89 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA89 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA89 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA89 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA89 |
| Brian Carter | Iowa Conference of United Methodist Church | Supporting | GA89 |
| Gary Nims | Iowa Conference of United Methodist Church | Supporting | GA89 |
| Rita Carter | Iowa Conference of United Methodist Church | Supporting | GA89 |
| Roberta Paige | Iowa Conference of United Methodist Church | Supporting | GA89 |
| Jeff Smith | Iowa Corn Growers Association | Undecided | GA89 |
| Jerry Fitzgerald | Iowa Corn Growers Association | Undecided | GA89 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association | Undecided | GA89 |
| Matt Fitzgerald | Iowa Corn Growers Association | Undecided | GA89 |
| Mindy Poldberg | Iowa Corn Growers Association | Undecided | GA89 |
| Colin Tadlock | Iowa Department of Agriculture & Land Stewardship | Undecided | GA89 |
| John Torbert | Iowa Drainage District Association | Undecided | GA89 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA89 |
| Angela Davis | Iowa Environmental Council | Undecided | GA89 |
| Angela Davis | Iowa Environmental Council | Supporting | GA89 |
| Don Petersen | Iowa Farm Bureau Federation | Undecided | GA89 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Undecided | GA89 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Undecided | GA89 |
| Hannah McDowell | Iowa Farmers Union | Undecided | GA89 |
| Nick Laning | Iowa Farmers Union | Undecided | GA89 |
| Threase Harms | Iowa Farmers Union | Undecided | GA89 |
| Blake DeRouchey | Iowa Homeland Security & Emergency Management Div. | Undecided | GA89 |
| Alan Kemp | Iowa League of Cities | Undecided | GA89 |
| Daniel Stalder | Iowa League of Cities | Undecided | GA89 |
| Robert Palmer | Iowa League of Cities | Undecided | GA89 |
| Drew Mogler | Iowa Pork Producers Association | Undecided | GA89 |
| Jeff Smith | Iowa Pork Producers Association | Undecided | GA89 |
| Jerry Fitzgerald | Iowa Pork Producers Association | Undecided | GA89 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association | Undecided | GA89 |
| Matt Fitzgerald | Iowa Pork Producers Association | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA89 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA89 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA89 |
| William Peterson | Iowa State Association of Counties | Undecided | GA89 |
| Jamie Cashman | Iowa State Association of County Supervisors | Undecided | GA89 |
| Kristi Harshbarger | Iowa State Association of County Supervisors | Undecided | GA89 |
| Lucas Beenken | Iowa State Association of County Supervisors | Undecided | GA89 |
| William Peterson | Iowa State Association of County Supervisors | Undecided | GA89 |
| Tim Wagner | Izaak Walton League of America | Undecided | GA89 |
| Tim Wagner | Izaak Walton League of America | Withdrawn | GA89 |
| Tim Wagner | Izaak Walton League of America | Supporting | GA89 |
| Emily Piper | Rathbun Regional Water Association | Supporting | GA89 |
| Doug Struyk | The Nature Conservancy | Supporting | GA89 |
| Jennifer Dorman | The Nature Conservancy | Supporting | GA89 |
| Jim Carney | The Nature Conservancy | Supporting | GA89 |
| Brad Epperly | res | Undecided | GA89 |
| Dustin Miller | res | Undecided | GA89 |