Given the recent momentum, I would not be surprised if Clinton win NC.
Here an excerpt from the Washington Post:
'Her operatives speak confidently about winning in Indiana. They are publicly playing down their chances of victory in North Carolina, but her schedule suggests otherwise. Clinton is almost spending as much time in the Tar Heel state as the must-win state of Indiana--as is her husband, who is campaigning extensively in rural towns in both states. Her aides think finishing only a few points behind Obama in North Carolina and winning in Indiana and other states in May could push her to a lead in the overall popular vote, even without counting votes in Michigan and Florida.
Ace Smith, Clinton's North Carolina state director, is repeating the campaign's mantra that a win in the Tar Heel State would be "the upset of the century." Clinton operatives in both Indiana and North Carolina are targeting independent voters in both states, believing a demographic that heavily favored Obama in early primaries is now shifting to the New York Senator. And the endorsement of Gov. Mike Easley of North Carolina added to the Clinton camp's sense of momentum there. '