A judge declared Friday that a former aide to John Edwards was in contempt of court, demanding that he turn over a "personal" videotape being sought by Edwards' former mistress.
Registration closes on Friday, but the number of voters is expected to grow because of a new law allowing voters to register and vote on the same day beginning April 17.
North Carolina's May 6 primary is second in size only to Pennsylvania among the 12 contests left, and the state's 134 delegates will be the last triple-digit treasure for the two candidates to divide.