One of the things which I think tends to cause a little bit of confusion with regards to House races is the idea of Charlie Cook's Partisan Voter Index, so to solve a bit of the confusion, I'd like to take the time to discuss what the PVI is, how it's used, and its strengths and weaknesses. Just so we're clear, I have absolutely no connection to Charlie Cook or Polidata, nor should this necessarily be taken as their words. This is, essentially, a way to understand, at least to my mind, the logic behind the PVI.
So follow me, fellow SSPers and discover the wonder that is the PVI!
