North Carolina voters head to the polls Tuesday to decide whether to amend the state's constitution with a ban on same-sex marriage.
There is already a law against gay marriage in North Carolina, but it is the only state in the South that has not passed a constitutional amendment -- and laws can be overturned more easily than constitutional amendments.
The constitutional measure has sparked reactions from all sides. There have been protests in the streets. Former President Bill Clinton has a recorded telephone advertisement urging voters to oppose the amendment.
"If it passes, it won't change North Carolina's law on marriage," Clinton says in the ad. "What it will change is North Carolina's ability to keep good businesses, attract new jobs, and attract and keep talented entrepreneurs."
Evangelist Billy Graham and his son, Franklin, have come out in support of the amendment in a newspaper advertisement.
"I want you to take a stand for God's definition of marriage and that is between a man and a woman," Franklin Graham said.
Experts expect the measure to pass.