The only real candidate for the GOP nomination, Mr Mitt said "f**k you" Iowa and your Marriage Vow.
Andrea Saul, a spokeswoman for Romney, told The Associated Press in a written statement Tuesday that Romney "strongly supports traditional marriage," but that the oath "contained references and provisions that were undignified and inappropriate for a presidential campaign."
Bachmann and Santorum have been campaigning hard to court the influential social conservatives in Iowa, which holds the nation's first caucuses. Romney's rejection of the pledge reflects his diminished focus on winning Iowa, where he spent $10 million during his 2008 presidential campaign only to finish second.
None of the other GOP presidential hopefuls, including former Minnesota Gov. Tim Pawlenty and former U.S. House Speaker Newt Gingrich, have said whether they will sign the pledge or not.
Romney, who supported rights for gay couples in Massachusetts, was criticized in Iowa by some Iowa social conservatives during his 2008 campaign, when he finished second in the caucuses after aggressively courting Christian conservatives.Alright, Mitt; stand your ground