The North Carolina State Board of Elections is reporting that over 100,000 voters cast ballots yesterday, the first day of early voting in the state.

In that one day, Democrats had the clear advantage:

State Board of Elections data showed that 64 percent of voters who went to the polls Thursday were registered Democrats, while 21 percent of voters were registered Republicans. Another 15 percent were unaffiliated.

The record turnout, especially among Democrats, is being fueled by the sense that, for the first time in decades, North Carolina is in play. Both presidential campaigns are investing heavily in NC, although Obama is outspending McCain 2-1 in advertising.

Sarah Palin made two campaigns stops in NC this week, and Obama will lead a rally in Fayetteville -- the heart of NC military country -- this weekend.

Another boost for early voting turnout: North Carolina is the only state in the South with same-day voter registration, which boosts the ability of candidates to bring new voters to the polls.