A while ago, I wrote that the electoral behavior of Oregon and Washington is fairly similar, which is not exactly a gigantic surprise.
I decided to look for the two states that have the least electoral similarity, and I probably have found them:
Vermont and South Carolina. Throughout much of its history, Vermont was a very Republican state, and South Carolina was a very Democratic state. (This may come as a surprise to some of you.) Since 1992, this has of course reversed. But in their history, Vermont and South Carolina have usually had gigantic differences in electoral margins.
In fact (and this is probably the only states this can be said of), Vermont and South Carolina have never voted for a Democratic candidate in the same election).
Notice that these numbers are margins, not total votes. Notice that South Carolina is up around the 98 mark as a margin. During the years of the "solid south", South Carolina had elections with numbers like 99%-1%. Vermonts Republican margins were usually pretty big, but not quite THAT big.
So, when do you think Vermont and South Carolina will finally agree?