A majority of voters say they would vote to repeal Proposition 8, California's gay marriage ban, according to a Field Poll to be released today.

Among 761 registered voters, a slim majority (48%) say they would vote against the contentious constitutional amendment that overturned the state Supreme Court's May ruling in favor of gay marriage.

But forty-seven percent of respondents say they would keep the ban and 5 percent remain undecided.

The question to overturn Proposition 8 is currently being considered by the California Supreme Court. A ruling is expected before June.

Proposition 8 was approved by voters by a slim 4 percent margin (52% to 48%). Today's poll shows opinions have not wavered much since November, despite large demonstrations and public protests against the measure.

“The results reveal a voting public that remains sharply divided both overall and across political, demographic and regional lines,” Field Poll Director Mark DiCamillo said.

A majority of Republicans surveyed remain steadfastly against gay marriage (70- to -24%), while Democrats strongly approve (63- to -31%).

Young voters between 18 and 39 favor gay marriage by 55 percent while seniors over 65 are 58 percent opposed, according to the poll.

Gay activists in California are definitely not waiting to find out if the state Supreme Court rules in their favor. Several organizations, most notably the Courage Campaign, support a new ballot measure. And this week, Equality California, the group that was in charge of the campaign against Proposition 8, beefed up their leadership roster.

“We don't expect the court will rule to overturn Prop. 8 so there will likely be another initiative,” Rick Jacobs, chair and founder of the Courage Campaign, told the San Francisco Chronicle. “The movement understands that we will have to win at the ballot box as soon as it is politically feasible.”

Poll results indicate success for gay activists would largely depend on voter turnout. It might hinge on the composition of voters who show up on Election Day; primarily young Democrats and older Republicans.