League of Women Voters is totally nonpartisan, in case that wasn't clear from my original post. It is a good starting point for any research a potential voter needs to feel confident about down-ballot races.

As for NC residents, also check out You Can Vote (youcanvote.org). It is also nonpartisan. I especially like the "Who's on the Ballot?" and "What's on the Ballot?" handouts, both of which can be found here: youcanvote.org/handouts