Mitt Romney on Tuesday criticized a ruling by the Ninth Circuit Court of Appeals which ruled California's gay marriage ban, Proposition 8, unconstitutional, media watchdog reported.

California voters in 2008 approved the amendment, which put an end to the weddings of gay and lesbian couples taking place in the state after the California Supreme Court legalized the institution.

(Related: Court says gay marriage ban Prop 8 violates 14th Amendment.)

“Today, unelected judges cast aside the will of the people of California who voted to protect traditional marriage. This decision does not end this fight, and I expect it to go to the Supreme Court. I believe marriage is between a man and a woman and, as president, I will protect traditional marriage and appoint judges who interpret the Constitution as it is written and not according to their own politics and prejudices,” Romney said.

Romney is not the only GOP presidential candidate to knock the ruling: Rick Santorum and Newt Gingrich also labeled the ruling an act of judicial activism.