A measure which would ban gay marriage in North Carolina, as well as civil unions and domestic partnerships for gay couples, is up by 14 points as the campaign heads into the last week and early voting is already under way.

According to a Public Polling Policy survey of 982 likely North Carolina primary voters, 55 percent of respondents said they favor the amendment, while 41 remain opposed.

Opposition to the measure rose slightly among Republicans (from 17% to 21%), independents (43% to 46%) and African Americans (39% to 43%). A majority of Democrats (54%) oppose the measure.

While a majority of primary voters (55%) support legal recognition of the unions of gay couples, if not full marriage equality, only 40 percent of respondents surveyed knew that the amendment would ban both civil unions and marriage for gay couples.

“Voters who understand what the amendment does are opposed to it,” said Dean Debnam, president of Public Policy Polling. “But there's a lot of education left to be done in this final week of the campaign.”

(Related: Dr. Franklin Graham, son of Billy Graham, endorses North Carolina gay marriage ban Amendment One.)