Republican presidential frontrunner Mitt Romney has found an anti-same-sex marriage pledge he can sign: from the National Organization for Marriage.

The organization announced on its website August 4 that Romney and three other Republican presidential hopefuls –Michele Bachmann, Rick Santorum, and Tim Pawlenty—signed a five-point pledge opposing same-sex marriage.

The vaguely-worded pledge has the candidates promising to support and “send to the states” a federal marriage amendment (presumably to the U.S. Constitution) defining marriage as “one man and one woman.” It promises they will defend the Defense of Marriage Act (DOMA) in court, and appoint judicial officials who will “respect the original meaning of the Constitution.” And it promises they will create a presidential commission to investigate the “harassment of traditional marriage supporters,” and “advance legislation” to allow voters in Washington, D.C., to consider an initiative to repeal the city’s marriage equality law.

Last month, Romney and four other Republican presidential contenders refused to sign a bizarre “Marriage Vow” circulated by an anti-gay marriage group in Iowa. Among other things, the vow had candidates promising to oppose even “court-imposed recognition” of same-sex marriage. A spokesperson for the Romney campaign said that Romney “felt this pledge contained references and provisions that were undignified and inappropriate for a presidential campaign.” Others who refused to sign it were former Minnesota Governor Tim Pawlenty, former House Speaker Newt Gingrich, former New Mexico Governor Gary Johnson, and for Utah Governor Jon Huntsman.

Only two Republicans –Bachmann and Santorum—signed the “Vow.”