Groups Against 71
- 350 Colorado
- 350 Central Colorado
- ACLU of Colorado
- America Votes
- Arapahoe Tea Party
- Be The Change-USA
- Bell Policy Center
- Boulder City Council
- Boulder County Commission
- Boulder County Republicans
- Citizens for Huerfano County
- Citizens in Charge
- Citizens Project
- Clean Energy Action
- CLLARO
- Coloradans for Civil Liberties
- Coloradans Resisting Extreme Energy Development
- Colorado AFL-CIO
- Colorado Campaign for Life
- Colorado Center on Law & Policy
- Colorado Common Cause
- Colorado Community Rights Network
- Colorado Education Association Colorado Firearms Association
- Colorado Firearms Coalition
- Colorado Firearms Coalition
- Colorado Fiscal Institute
- Colorado People’s Alliance
- Colorado Right to Life
- Colorado Rising
- Colorado Statewide Parent Coalition
- Colorado Tea Party Patriots
- Colorado Term Limits Coalition
- Colorado Union of Taxpayers
- Conservation Colorado
- CoPIRG
- Delta County Libertarian Party
- Denver Democratic Party
- Denver Green Party
- Denver Republican Party
- Divestment Student Network
- Eagle County Republican Party
- Earthworks
- Eco-Justice Ministries
- F.A.C.E.U.S. (Families Against Court Embezzlement Unethical Standards)
- Food and Water Watch
- Fort Collins Sustainability Group Steering Committee
- Frack Free Colorado
- Fractivist
- FRESC: Good Jobs Strong Communities
- Generation Latino
- Green Cities Coalition of the Pikes Peak Region
- Greenpeace USA
- Humane Society of the United States
- Independence Institute
- Jefferson County Republican Party
- The Judicial Integrity Project
- Lakewood Fractivists
- Libertarian Party of Colorado
- LOGIC (League of Oil and Gas Impacted Coloradans)
- Metro Denver Community Rights
- Mi Familia Vota
- MindDrive Legal Services LLC
- NAACP-MT-WY State Conference
- NARAL Pro-Choice Colorado
- New Era Colorado
- Northern Colorado Community Rights
- North Metro Neighbors for Safe Energy
- Our Broomfield
- Our Health, Our Future, Our Longmont
- Padres & Jóvenes Unidos
- Planned Parenthood of the Rocky Mountains
- Progress Now Colorado
- Protect Our Loveland
- The Question Alliance
- Route County Republican Party
- SEIU State Council
- Servicios de la Raza
- Sierra Club Rocky Mountain Chapter
- South Park Coalition
- Stop Over Development Douglas County
- TABOR Committee
- Transparent Courts
- Wall of Women Colorado
- Weld Air and Water
- What the Frack?! Arapahoe
public officials/candidates Against 71
- Steve Fenberg – State Senate Candidate
- Anne Harper Weld County Commissioner Candidate
- Curtis Imrie – U.S. Congress, Colorado District 5 Candidate
- Chris Kennedy – State House District 23 Candidate
- Alice Madden – Regent at Large Candidate
- Arn Menconi – Green Party US Senator Candidate
- Mary Parker –House District 22 Candidate
- Adrian “Buzz” Sweeney – State House District 49 Candidate
- Adams County GOP Chair Anil Mathai
- Boulder Mayor Suzanne Jones
- Commerce City Councilman Steve Douglas
- Congressman Jared Polis
- Longmont City Councilor Joan Peck
- RTD Director Natalie Menten
- State Board of Education Chairman Steve Durham
- State Representative Mike Foote
- State Representative Steve Lebsock
- State Representative Tim Leonard
- State Representative Brittany Petersen
- State Representative Kim Ransom
- State Representative Joe Salazar
- State Representative Jonathan Singer
- State Representative Jesse Ulibarri
- State Representative Faith Winter
- State Senator Irene Aguilar
- State Senator Morgan Carroll
- State Senator John Cooke
- State Senator Justin Everett
- State Senator Steve Humphrey
- State Senator Matt Jones
- State Senator John Kefalas
- State Senator Kent Lambert
- State Senator Kevin Lundberg
- State Senator Michael Merrifield
- State Senator Tim Neville
- Former Colorado State Senate President John Andrews
- Former Congressman Bob Beauprez
- Former Congressman Tom Tancredo
- Former State Senator Dave Schultheis
Newspapers and Radio hosts Against 71
- The Aurora Sentinel
- Boulder Weekly
- Boulder Daily Camera
- The Denver Post
- Greeley Tribune
- Summit Daily
- Radio host Jeff Crank
- Radio host Mike Rosen