Barack Obama is having better luck with North Carolina voters this week than he did with the North Carolina Tarheels, according to SurveyUSA’s latest Democratic primary tracking poll conducted exclusively for WTVD-TV in Raleigh.

If the presidential primary were held today, Obama would take 49% of the vote; Hillary Clinton would take 39%. That’s essentially unchanged from an identical poll conducted four weeks ago, when Obama led by 8, and from an identical poll conducted four weeks prior to that, when Obama again led by 10. See the tracking graphs here.

Little has changed month-to-month among most demographic subgroups:  Among men, over the past two months, Obama led by 18, by 13, and now by 15 points. Among women, Obama led by 2, by 3, and today by 6 points. Among whites, Clinton led by 19, by 17, and today by 22 points. Among blacks, Obama led by 65, by 61, and today by 75 points.

Geographically, Obama has gained ground in Raleigh, where he led by 8 points last month and by 18 points today. The contest remains effectively tied in Charlotte, with Clinton now sea-sawing past Obama, but still within sampling error. Obama retains the slightest lead in Southern and Coastal Carolina, where he led by 4 in February, by 8 in March, and by 11 today. Among voters under age 50, Obama’s lead has increased from 19 points last month to 29 points today. Among voters age 50+, Clinton advances slightly, from a 4-point lead last month to an 11-point lead today.