In 2008, the church participated in a campaign in support of California Proposition 8, which proposed limiting the definition of marriage to a union of one man and one woman. This mobilized many of its members to donate time and money towards the initiative. The political organization ProtectMarriage.com, the official proponents of Proposition 8, estimate that about half the donations they received came from Mormon sources, and that "eighty to ninety percent" of the early volunteers going door-to-door were members of the LDS Church. The church was criticized for its involvement by non-members and by some of its members, and in 2010, general authority Marlin K. Jensen personally apologized to church members in California for the church's role. In December 2012 a landmark website "Mormons and Gays" was launched dedicated to the topic of homosexuality.