The National Organization for Marriage (NOM) this week launched an ad in South Carolina in which it accuses Republican presidential candidate Donald Trump of abandoning the fight against marriage equality.

“When the U.S. Supreme Court imposed gay marriage, Donald Trump didn't fight for us. He dumped us,” a female narrator says in 30-second spot.

“You have to go with it,” Trump is heard saying. “The decision's been made, and that is the law of the land.”

“When Trump quit on marriage,” the narrator says, “he quit on South Carolina and on over 50 million American voters. It's time to dump Trump.”

According to NOM, the ad was produced by Frank Schubert, who managed the campaigns that resulted in passage of marriage bans in California and South Carolina.

NOM has endorsed the presidential campaign of Trump's main GOP rival, Texas Senator Ted Cruz, a vocal opponent of marriage equality.