Basically, I'm due to interview a a polls/elections guru about the midterms a couple days after the polls close.

He's very nitty gritty and will talk about specifics of gerrymandering and so on, it's more or less my job to rein him in so he talks about the juiciest bits before the audience tunes out.

I'm not American, so to watch the midterms as they come in I'd have to stay up beyond midnight, and obviously no one really talks about it here either in more than vague terms, so please enlighten me!

Obviously I've done a fair amount of research already, the problem is sorting which are the most interesting without an actual ear to the ground. America is a very big place.