One other way to look at expanding the map. The chart above is from FiveThrityEight, mapping how Obama is doing relative to how Kerry did against Bush. The states that McCain is doing better than Bush in are, for the most part, either Republican base states like Kentucky and Tennessee or Democratic base states, like New York and Massachusetts. Obama is drastically overperforming Kerry in the West and the South and is holding steady with Kerry in the big swing states. It will be interesting to see how this develops, but this is but one way to look at how Obama can expand the map.