When PPP last polled North Carolina a week ago, the results were this:
Do you think same-sex marriage should be legal or illegal?
Legal............................................................... 31%
Illegal .............................................................. 61%
State legislators have proposed an amendment to the North Carolina Constitution that would prohibit the recognition of marriage, civil unions, or domestic partnerships for gay and lesbian couples. If the election was held today, would you vote for or against this amendment?
Would vote for it.............................................. 30%
Would vote against it ...................................... 55%
http://www.publicpolicypolling.com/pdf/2011/PPP_Release_NC_09071217.pdf...
I think it depends on the language of the ballot question. Does it only call for a ban of same-sex marriage, or does it call for a ban on all forms of same-sex partnerships incl. civil unions, registered partnerships etc. ?
This could make the difference to people who are primarily against gay marriage, but would not support the amendment because they favor civil unions and do not want them banned in the constitution.
Anther point could be the fact that North Carolina already has a state statute that bans same-sex marriage, so voters could think: Hey, why having an additional referendum for a constitutional amendment ? That's dispensable.