Mayors Sam Adams of Portland, Jerry Sanders of San Diego and Annise Parker of Houston urge Americans to support gay marriage in a new video released on Wednesday.

Mayors for the Freedom to Marry announced that the number of mayors joining the group had more than doubled since its January 20 debut, from 80 to 175.

The mayors have pledged to support efforts to legalize gay nuptials in their home states.

Featured in the 60-second video are chairs Mayor Antonio Villaraigosa of Los Angeles, Mayor Jerry Sanders of San Diego, and Mayor Annise Parker of Houston, in addition to co-chairs including Mayor Marilyn Strickland of Tacoma, WA; Mayor Pedro Segarra of Hartford, CT; Mayor Sam Adams of Portland, OR; Mayor Setti Warren of Newtown, MA; Mayor Jeffrey Slavin of Somerset, MD; Mayor Ed Lee of San Francisco, CA; Mayor Laura Friedman of Glendale, CA; Mayor Stephen Cassidy of San Leandro, CA; Mayor John Callahan of Bethlehem, PA; and Mayor Craig Cates of Key West, FL.

In 2007, Sanders, one of the few Republicans in the group, held an emotional press conference in which he tearfully reversed his opposition to marriage equality, telling reporters, “I have close family members and friends who are members of the gay and lesbian community. Those folks include my daughter Lisa.”

“Equality and marriage is something I think touches every family,” Sanders said in the video. (The video is embedded in the right panel of this page. Visit our video library for more videos.)

(Related: Annise Parker nudges Obama on gay marriage; Mayor called on to resign.)