Raleigh-based Public Policy Polling found 55 percent of those questioned on May 5-6 supported the amendment banning gay marriage and civil unions while 39 percent opposed it. The poll had a margin of error of plus or minus 3.1 percent.
Twenty-eight states have voter-approved constitutional bans on same-sex marriages, according to the National Conference of State Legislatures.
Massachusetts, Iowa, Vermont, New Hampshire, Connecticut, New York and the District of Columbia allow gay and lesbian nuptials. Maryland, New Jersey and Washington state passed laws this year approving same-sex marriage, but Governor Chris Christie vetoed New Jersey's law and opponents of Maryland's and Washington's are threatening ballot initiatives to overturn those laws.
OTHER BALLOT ISSUES
North Carolina voters also will consider candidates for gubernatorial and congressional races.
The state's 13-member congressional delegation currently includes seven Democrats and six Republicans, but Republicans see an opportunity to pick up seats with the retirement of two Democratic incumbents.