Amazing map. What astounds me is how Pennsylvania and New Hampshire could have nearly identical statewide results even though the maps look totally different. PA looks like a Romney landslide with a sea of dark blue and small islands of red, while NH is at least 2/3 red indicating a strong Obama victory.
I guess Pennsylvania gave us your standard results, with Democratic strength concentrated in small but very populous urban areas and Republicans winning in large yet sparsely populated rural areas. But in NH Dems seem to win the most rural areas while Republicans are winning the suburban areas near Massachusetts, so it's like the opposite of PA.
Could I request a GA map? I know it's not your region of expertise but I've been dying to see one.