From Equality California Institute:
Based on polling data funded by Equality California Institute and conducted by David Binder Research, the study found that voters who supported Prop 8 were primarily influenced by:
• Ideology – 82% of voters who identify as conservatives voted “Yes”
• Party – Republicans voted more than 80% in favor of Prop 8
• Religiosity – 70% of weekly church goers voted “Yes”
• Age – 67% of voters born before World War II voted “Yes”
The study also showed that race was not a driving factor in the election, as was purported by the National Election Pool (NEP) poll which said 70% of African-Americans voted for Prop 8. Our study found the number closer to 57% to 59%.
One of the most important--and rewarding--findings was the movement in all groups, except Republicans, toward support for full marriage equality. From 2000 to 2008 we moved Californians 9% in support of same-sex marriage – an amazing change in such a short time!
