46% of new voter registrations Democrat; 37% Unaffiliated; 17% Republican.

As for Democrats, here's a very important statistic: 63% of the growth in N.C. Democratic voter registrations since January has been due to new African-American voters. Black voters make up 45% of registered Democrats in the state, and 20% of the overall N.C. electorate.

A final interesting tidbit: the demographic groups that have added the most voters since January are those identifying as "Hispanic" (10% increase) and "Other" (4%). Those two groups still represent a relatively small share of the state's voters -- 134,000 state-wide, or just over 2% of North Carolina voters. But in a close primary, that could make a difference.

This is most certainly a factor in recent polls that show Obama pulling ahead of Clinton in the state.