Former GOP presidential candidate Michele Bachmann has criticized a federal court's ruling which found Proposition 8, California's gay marriage ban, unconstitutional.

The Ninth Circuit Court of Appeals on Tuesday upheld a lower court's 2010 decision which found the 2008 voter-approved amendment to violate the constitutional rights of gay and lesbian couples who wish to marry in the state.

“The people of the state of California have the right to vote on the laws that they living under,” Bachmann told The Huffington Post.

“They made a vote in 2008. That's when Barack Obama was running for president. And it's amazing, really, what a decisive outcome it was, so it's interesting, that now you find federal judges trying to undermine the will of the people. That's what federalism is about, and that's why you'll see this case go to the Supreme Court.”

Bachmann spoke to the online outlet after addressing the annual Conservative Political Action Conference (CPAC) in Washington D.C. on Thursday.

Remaining candidates Mitt Romney, Rick Santorum and Newt Gingrich have also criticized the ruling.