In an interesting statistic from North Carolina, the number of registered Republicans has actually gone down by about 6,700 this in this Southern state — while over 165,000 new voters have joined the rolls from the Democratic campaigns' registration drives.

While it's not a guarantee that the state could go Democratic for president, it could still be a good measure of overall partisan enthusiasm. If more voters are switching from the Republicans to being Democrats or independents, it could be a hint to down-ticket campaigns about which voters to target in order to retain Democratic seats and go after Republican ones.