| Drew Klein | Americans For Prosperity | Undecided | GA87 |
| Drew Kamp | Ames Chamber of Commerce | Undecided | GA87 |
| Jim Obradovich | Conservation Districts of Iowa | Supporting | GA87 |
| Stacey Pellett | Deere & Company | Undecided | GA87 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA87 |
| Steve Falck | Environmental Law and Policy Center | Undecided | GA87 |
| Andrea Woodard | Greater Des Moines Partnership | Undecided | GA87 |
| Brad Epperly | Greater Des Moines Partnership | Undecided | GA87 |
| Dustin Miller | Greater Des Moines Partnership | Undecided | GA87 |
| Joe Murphy | Greater Des Moines Partnership | Undecided | GA87 |
| Paige Thorson | Greater Des Moines Partnership | Undecided | GA87 |
| Paula Dierenfeld | Greater Des Moines Partnership | Undecided | GA87 |
| Brian Carter | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Gary Nims | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Marty Ryan | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Rita Carter | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Sheila Corsbie | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Stephanie Fawkes-Lee | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Walden Paige | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| William Steward | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Jessica Hyland | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Amy Campbell | Iowa Association of County Conservation Boards | Undecided | GA87 |
| Craig Patterson | Iowa Association of County Conservation Boards | Undecided | GA87 |
| Timothy Whipple | Iowa Association of Municipal Utilities | Undecided | GA87 |
| Linda Kinman | Iowa Association of Water Agencies | Undecided | GA87 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA87 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA87 |
| John Stineman | Iowa Chamber Alliance | Undecided | GA87 |
| Paige Thorson | Iowa Chamber Alliance | Undecided | GA87 |
| Paula Dierenfeld | Iowa Chamber Alliance | Undecided | GA87 |
| Deborah Neustadt | Iowa Chapter of Sierra Club | Undecided | GA87 |
| Neila Seaman | Iowa Chapter of Sierra Club | Undecided | GA87 |
| Doug Struyk | Iowa Drainage District Association | Undecided | GA87 |
| Jim Carney | Iowa Drainage District Association | Undecided | GA87 |
| John Torbert | Iowa Drainage District Association | Undecided | GA87 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA87 |
| Shannon Henson | Iowa Drainage District Association | Undecided | GA87 |
| Kerri Johannsen | Iowa Environmental Council | Undecided | GA87 |
| Ralph Rosenberg | Iowa Environmental Council | Undecided | GA87 |
| Don Petersen | Iowa Farm Bureau Federation | Opposing | GA87 |
| Marty Schwager | Iowa Farm Bureau Federation | Opposing | GA87 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Opposing | GA87 |
| John Benson | Iowa Homeland Security & Emergency Management Div. | Undecided | GA87 |
| Mike St. Clair | Iowa Institute for Cooperatives | Undecided | GA87 |
| Amy Campbell | Iowa Natural Heritage Foundation | Undecided | GA87 |
| Craig Patterson | Iowa Natural Heritage Foundation | Undecided | GA87 |
| Dane Schumann | Iowa Rivers Revival | Undecided | GA87 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA87 |
| Kristi Harshbarger | Iowa State Association of Counties | Supporting | GA87 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA87 |
| William Peterson | Iowa State Association of Counties | Supporting | GA87 |
| William Heckroth | Iowa State Association of County Supervisors | Supporting | GA87 |
| Jennifer Kingland | Iowa Taxpayers Association | Undecided | GA87 |
| Brian Johnson | Polk County - Board of Supervisors | Supporting | GA87 |
| Brian Johnson | Polk County - Board of Supervisors | Undecided | GA87 |
| Brad Epperly | Resources Environmental Solutions | Undecided | GA87 |
| Dustin Miller | Resources Environmental Solutions | Undecided | GA87 |
| Paige Thorson | Resources Environmental Solutions | Undecided | GA87 |
| Paula Dierenfeld | Resources Environmental Solutions | Undecided | GA87 |
| Doug Struyk | The Nature Conservancy | Undecided | GA87 |
| Jim Carney | The Nature Conservancy | Undecided | GA87 |
| Shannon Henson | The Nature Conservancy | Undecided | GA87 |