SAN FRANCISCO (CWNews.com) - A new poll published in the San Francisco Examiner newspaper on Monday showed California voters support a ban on same-sex marriage by a large margin.

    The poll by Research 2000 in Rockville, Maryland, said 55 percent of likely voters support Proposition 22, 38 percent oppose, and 7 percent are undecided. The results are consistent with every poll published since October. Voters will decide on the ban next week as they vote in the presidential primaries.

    While same-sex marriage is not legal in California or any other state, Proposition 22 would define marriage as "between a man and a woman only," and would prohibit the state from legally recognizing same-sex marriages performed in other states if they become legal there.

    The measure is favored in all demographic groups and all parts of the state, except in the Bay Area near San Francisco which has a large homosexual population. The survey also showed support for the measure was not affected by TV ad campaigns supporting or opposing the proposal.