Proposition 8 is an initiative passed in California on November 4, 2008 that banned same-sex marriage. The measure passed by 52% to 48%. It changed California's Constitution by adding a section that says, "Only marriage between a man and a woman is valid or recognized in California." The law was in response to a judge's ruling that gay marriage was legal under the California state Constitution. The campaign to pass Proposition 8 was mostly paid for by the Church of Jesus Christ of Latter-Day Saints.