The Issue:  According to a survey conducted of 500 California Adults (of whom 198 supported Prop 8), 8% have changed their mind because of the protests and rallies that have occurred.  An equal portion of all voters felt that the protests hurt their cause as helped their cause (with 28% each)

SurveyUSA is an independent, non-partisan, full-service opinion research firm that conducts scientific research for media, government, and private-sector clients. By many measures, SurveyUSA is the nation’s largest public opinion polling firm. As of 2002, 19 of the nation’s then 25 largest media companies had contracted with SurveyUSA to conduct opinion research.

On November 19 SurveyUSA contacted 500 Californians who voted in the 2008 Election and asked them about their opinions of Proposition 8 and the opposition protesters (on behalf of KFSN-TV in Fresno)

The survey results can be read in detail here.

A few highlights from the data:

1. When asked whether the protesters have hurt or helped the gay marriage cause an equal number said that the cause was hurt as those that said it helped (28% of respondents said each response).
2. Only 40% of the respondents supported Prop 8, while 48% opposed it.  46% opposed the measure while 12% didn’t vote on the response.
3. Of the Prop 8 supporters, 8% have changed their mind on Prop 8 and 2% are now undecided.