| Steven Van Steenhuyse | American Planning Association Iowa Chapter | Opposing | GA88 |
| Drew Kamp | Ames Chamber of Commerce | Undecided | GA88 |
| John McCormally | Auditor of State | Opposing | GA88 |
| MIke Delaney | Citizens For A Healthy Iowa | Opposing | GA88 |
| Gary Grant | City of Cedar Rapids | Opposing | GA88 |
| Larry Murphy | City of Cedar Rapids | Opposing | GA88 |
| Meghan Malloy | City of Cedar Rapids | Opposing | GA88 |
| Jon Murphy | City of Coralville | Opposing | GA88 |
| Tom Cope | City of Coralville | Opposing | GA88 |
| Gary Grant | City of Vinton | Opposing | GA88 |
| Larry Murphy | City of Vinton | Opposing | GA88 |
| Meghan Malloy | City of Vinton | Opposing | GA88 |
| Julie Smith | City of West Des Moines | Undecided | GA88 |
| Sydney Gangestad | City of West Des Moines | Undecided | GA88 |
| Tim Coonan | City of West Des Moines | Undecided | GA88 |
| Dane Schumann | Connect CR | Opposing | GA88 |
| Maddie Wilcox | Connect CR | Opposing | GA88 |
| Threase Harms | Connect CR | Opposing | GA88 |
| Tim Reilly | Department of Revenue | Undecided | GA88 |
| Dane Schumann | Des Moines Water Works | Opposing | GA88 |
| Maddie Wilcox | Des Moines Water Works | Opposing | GA88 |
| Threase Harms | Des Moines Water Works | Opposing | GA88 |
| Marc Beltrame | Ducks Unlimited, Inc. | Opposing | GA88 |
| Andrea Woodard | Greater Des Moines Partnership | Opposing | GA88 |
| Brad Epperly | Greater Des Moines Partnership | Opposing | GA88 |
| Dustin Miller | Greater Des Moines Partnership | Opposing | GA88 |
| Joe Murphy | Greater Des Moines Partnership | Opposing | GA88 |
| Katie Graham | Greater Des Moines Partnership | Opposing | GA88 |
| Paula Dierenfeld | Greater Des Moines Partnership | Opposing | GA88 |
| Dane Schumann | Grow Clinton County | Opposing | GA88 |
| Maddie Wilcox | Grow Clinton County | Opposing | GA88 |
| Threase Harms | Grow Clinton County | Opposing | GA88 |
| Dane Schumann | Iowa Alliance of YMCA's | Opposing | GA88 |
| Maddie Wilcox | Iowa Alliance of YMCA's | Opposing | GA88 |
| Threase Harms | Iowa Alliance of YMCA's | Opposing | GA88 |
| Amy Campbell | Iowa Association of County Conservation Boards | Opposing | GA88 |
| Craig Patterson | Iowa Association of County Conservation Boards | Opposing | GA88 |
| Julie Smith | Iowa Association of Municipal Utilities | Opposing | GA88 |
| Timothy Whipple | Iowa Association of Municipal Utilities | Opposing | GA88 |
| Robert Hartwig | Iowa Bankers Association | Undecided | GA88 |
| Sharon Presnall | Iowa Bankers Association | Undecided | GA88 |
| Dane Schumann | Iowa Bicycle Coalition | Opposing | GA88 |
| Maddie Wilcox | Iowa Bicycle Coalition | Opposing | GA88 |
| Threase Harms | Iowa Bicycle Coalition | Opposing | GA88 |
| Eric Goranson | Iowa Bowhunters Association | Opposing | GA88 |
| Kellie Paschke | Iowa Cattlemen's Association | Supporting | GA88 |
| Troy Skinner | Iowa Cattlemen's Association | Supporting | 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 | Opposing | GA88 |
| Paula Feltner | Iowa Conservation Alliance | Opposing | GA88 |
| Jake Swanson | Iowa Dept. of Agriculture | Undecided | GA88 |
| Tammie Krausman | Iowa Dept. of Natural Resources | Undecided | GA88 |
| Alicia Vasto | Iowa Environmental Council | Opposing | GA88 |
| Cindy Lane | Iowa Environmental Council | Opposing | GA88 |
| Dane Schumann | Iowa Environmental Council | Opposing | GA88 |
| Maddie Wilcox | Iowa Environmental Council | Opposing | GA88 |
| Threase Harms | Iowa Environmental Council | Opposing | GA88 |
| Don Petersen | Iowa Farm Bureau Federation | Supporting | GA88 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Supporting | GA88 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Supporting | GA88 |
| Dane Schumann | Iowa Farmers Union | Opposing | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Opposing | GA88 |
| Threase Harms | Iowa Farmers Union | Opposing | GA88 |
| Carolann Jensen | Iowa Finance Authority | 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 |
| Amy Campbell | Iowa Natural Heritage Foundation | Opposing | GA88 |
| Anna Gray | Iowa Natural Heritage Foundation | Opposing | GA88 |
| Craig Patterson | Iowa Natural Heritage Foundation | Opposing | GA88 |
| Dane Schumann | Iowa Rivers Revival | Opposing | GA88 |
| Maddie Wilcox | Iowa Rivers Revival | Opposing | GA88 |
| Threase Harms | Iowa Rivers Revival | Opposing | GA88 |
| Emily Piper | Iowa Rural Water Association | Opposing | GA88 |
| Jamie Cashman | Iowa State Association of Counties | Opposing | GA88 |
| Kristi Harshbarger | Iowa State Association of Counties | Opposing | GA88 |
| Lucas Beenken | Iowa State Association of Counties | Opposing | GA88 |
| William Peterson | Iowa State Association of Counties | Opposing | 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 |
| Mike Heller | Iowa State Snowmobile Association | Undecided | GA88 |
| Paula Feltner | Iowa State Snowmobile Association | Undecided | GA88 |
| MIke Delaney | Izaak Walton League - Iowa Division | Opposing | GA88 |
| Gary Grant | Linn County Board of Supervisors | Opposing | GA88 |
| Larry Murphy | Linn County Board of Supervisors | Opposing | GA88 |
| Meghan Malloy | Linn County Board of Supervisors | Opposing | GA88 |
| Brian Johnson | Personal Interest-Brian Johnson | Opposing | GA88 |
| Amy Campbell | Polk County - Board of Supervisors | Opposing | GA88 |
| Brian Johnson | Polk County - Board of Supervisors | Opposing | GA88 |
| Craig Walter | Polk County - Board of Supervisors | Opposing | GA88 |
| MIke Delaney | Raccoon River Watershed Association | Opposing | GA88 |
| Emily Piper | Rathbun Regional Water Association | Opposing | GA88 |
| Sydney Gangestad | The Iowa Academy of Trust and Estate Counsel | Opposing | GA88 |
| Tim Coonan | The Iowa Academy of Trust and Estate Counsel | Opposing | GA88 |
| Amber Markham | The Nature Conservancy | Opposing | GA88 |
| Doug Struyk | The Nature Conservancy | Opposing | GA88 |
| Jennifer Dorman | The Nature Conservancy | Opposing | GA88 |
| Jim Carney | The Nature Conservancy | Opposing | GA88 |
| Gary Grant | Urban County Coalition | Undecided | GA88 |
| Gary Grant | Urban County Coalition | Withdrawn | GA88 |
| Gary Grant | Urban County Coalition | Opposing | GA88 |
| Larry Murphy | Urban County Coalition | Undecided | GA88 |
| Larry Murphy | Urban County Coalition | Withdrawn | GA88 |
| Larry Murphy | Urban County Coalition | Opposing | GA88 |
| Meghan Malloy | Urban County Coalition | Undecided | GA88 |
| Meghan Malloy | Urban County Coalition | Withdrawn | GA88 |
| Meghan Malloy | Urban County Coalition | Opposing | GA88 |