Wow this is a great site. It has short export commentary from a bunch of noted professors on previous elections. But the real draw is the technology presented here that includes historical electoral maps from 1840 to 2004. The maps are both cinematic (show changes and allow you to look at the sub state level for results) as well as interactive maps. It is put together by the Univ of Richmond and is really GREAT. I will be using it when I discuss previous elections.