Mariano Rajoy, the president of Spain's conservative Partido Popular (PP), has stiffened his stand against the nation's gay marriage law.

Rajoy is vying to become the nation's next prime minister in a contest to be held in early 2012.

Last month, he backtracked a bit from comments he made in a November interview with daily El Pais, in which he said he believed the nation's 5-year-old gay marriage law is unconstitutional and that he wouldn't keep the law even if a court decided it was constitutional. The PP has filed a constitutional challenge to the law.

He altered course a bit in December, saying on national television, “I'll await the resolution of the Constitutional Court and then listen to the people.”

But in a recent interview broadcast on Radio Nacional de Espana (RNE) radio, Rajoy backtracked, saying he would “change” the gay marriage law.

“And for example, if the Constitutional Court upholds the gay marriage law or the abortion law, would you keep them?” the interviewer asked.

“I've already said that I'll change the first, and the second I'll wait to hear from the Constitutional Court and listen to the people before making a decision,” Rajoy responded.

Pope Benedict XVI recently blessed via satellite an outdoor mass urging Roman Catholic Spaniards to oppose gay marriage.