Doug Mainwaring, the openly gay founder of the National Capital Tea Party Patriots, spoke towards the end of the National Organization for Marriage’s rally on the National Mall today where he warned that same-sex marriage will “unravel” marriage and “undefine children.”

Mainwaring, who in an essay wrote that he lives with his ex-wife but “because of my predilections, we deny our own sexual impulses,” urged the Supreme Court to “ignore the media’s relentless, manufactured urgency to institute same-sex marriage.”

“As a gay man, I can state categorically, it is not homophobic to oppose same-sex marriage,” Mainwaring told the crowd, “to the Supreme Court, legislators and jurists around the country: slow this train down.”

Watch: