Below is a list of supportive mayors:

Bill de Blasio, Mayor of New York City, NY
Rahm Emanuel, Mayor of Chicago, IL
Annise Parker, Mayor of Houston, TX
Greg Stanton, Mayor of Phoenix, AZ
Ben McAdams, Mayor of Salt Lake County, UT
Sam Liccardo, Mayor of San José , CA
Steve Adler, Mayor of Austin, TX
Edwin M. Lee, Mayor of San Francisco, CA
Mike Duggan, Mayor of Detroit, MI
A.C. Wharton, Jr., Mayor of Memphis, TN
Tom Barrett, Mayor of Milwaukee, WI
Robert Garcia, Mayor of Long Beach, CA
Elizabeth Hodges, Mayor of Minneapolis, MN
Kirk Caldwell, Mayor of Honolulu, HI
Carmen Yulín Cruz, Mayor of San Juan, Puerto Rico
Bob Buckhorn, Mayor of Tampa, FL
Francis Slay, Mayor of St. Louis, MO
William Peduto, Mayor of Pittsburgh, PA
John Cranley, Mayor of Cincinnati, OH
Christopher Coleman, Mayor of St. Paul, MN
Steven Fulop, Mayor of Jersey City, NJ
Rick Kriseman, Mayor of St. Petersburg, FL
Mike Spano, Mayor of Yonkers, NY
Mark Stodola, Mayor of Little Rock, AR
Jorge Elorza, Mayor of Providence, RI
María "Mayita" Meléndez, Ponce, Puerto Rico
Bill Finch, Mayor of Bridgeport, CT
Kim McMillan, Mayor of Clarksville, TN
Stephanie Miner, Mayor of Syracuse, NY
Nan Whaley, Mayor of Dayton, OH
Bob Coble, Former Mayor of Columbia, SC
Joseph P. Riley, Jr., Mayor of Charleston, SC
J. Christian Bollwage, Mayor of Elizabeth, NJ
Joseph Sinnott, Mayor of Erie, PA
David Bowers, Mayor of Roanoke, VA
Dayne Walling, Mayor of Flint, MI
Kathy Sheehan, Mayor of Albany, NY
Jorge Morales, Mayor of South Gate, CA
Jon Mitchell, Mayor of New Bedford, MA
Esther Manheimer, Mayor of Asheville, NC
Noam Bramson, Mayor of New Rochelle, NY
Thomas McDermott, Mayor of Hammond, IN
Dan Rivera, Mayor of Lawrence, MA
Elizabeth Tisdahl, Mayor of Evanston, IL
William Courtright, Mayor of Scranton, PA
Matt Hayek, Mayor of Iowa City, IA
Javier Gonzales, Mayor of Santa Fe, NM
Michael MaGuire, Mayor of Eagan, MN
Roy D. Buol, Mayor of Dubuque, IA
Thomas Roach, Mayor of White Plains, NY
Jim Hovland, Mayor of Edina, MN
Kimberley Driscoll, Mayor of Salem, MA
David Gyberts, Hagerstown, MD
Jim Bouley, Mayor of Concord, NH
Miro Weinberger, Mayor of Burlington, VT
Jason Pu, Mayor of San Gabriel, CA
Alex Morse, Mayor of Holyoke, MA
Andrew Fellows, Mayor of College Park, MD
JoAnn Seghini, Mayor of Midvale, UT
Tim Willson, Mayor of Brooklyn Center, MN
Marian McClellan, Mayor of Oak Park, MI
TJ Jean, Mayor of Rochester, NH
John Lundell, Mayor of Coralville, IA
Bob Lister, Mayor of Portsmouth, NH
Dave Coulter, Mayor of Ferndale, MI
Mark W. Huguley, Mayor of Arcadia Lakes, SC
Donald Pilon, Mayor of Saco, ME
J.M. Skip Conkling, Mayor of Altoona, IA
Amy Nielsen, Mayor of North Liberty, IA
Sandra Johnson, Mayor of Washington, IA
Fred Diehl, Mayor of Osceola, IA
Harlan Quick, Mayor of State Center, IA
Larry Butler, Mayor of Mechanicsville, IA
Shawn Hogan, Mayor of Hornell, NY
John Hollar, Mayor of Montpelier, VT
Walter Ash Jr., Mayor of Belfast, ME
Peter Lindstrom, Mayor of Falcon Heights, MN
Chris Taylor, Mayor of Swisher, IA
Joan Brown, Mayor of St. Charles, IA
Dana Hilliar, Mayor of Somersworth, NH
Norville Huston, Mayor of New Virginia, IA
John M. McNeill, Mayor of Red Springs, NC
Hans Trousil, Mayor of West Burlington, IA
Bill Moore, Mayor of Pleasantville, IA
James Bussanmas, Mayor of Bevington, IA
Michael Quill, Mayor of Auburn, NY
Robert G Taylor, Mayor of Duncombe, IA