From the polling guys at Daily Kos:
Our most recent poll from Research 2000 pits Democrats Roy Cooper, the current Attorney General of North Carolina, and Richard Moore, the state's former Treasurer, against the state's senior Senator Richard Burr. As expected, Burr is going to have a tough race on his hands if Moore or Cooper runs, a scenario which would present yet another major headache for newly minted NRSC chair John Cornyn.
Research 2000 for Daily Kos. 1/5-7. Likely voters. MoE 4% (No trend lines).
Burr (R) 45
Cooper (D) 43
Burr (R) 46
Moore (D) 40
Very nice-looking numbers for the two Democrats.
Nearly two years out, both of them have the incumbent under 50%, and Cooper is just two points shy of the Senator. Unsurprisingly, Moore's numbers aren't quite as strong as Cooper's - while Cooper was handily reelected as Attorney General in 2008, Moore suffered a loss in a rather acrimonious primary for Governor (fortunately for Democrats, the winner of the primary, Beverly Perdue, is Governor today).
Still, Moore's strong numbers indicate that Democrats have a good shot at the seat even if Cooper, the consensus top choice for the race, decides against a run.