Neal Stephenson's Fall [1] is by far not his best book, however, the first part has a chilling depiction of societal divide into Ameristan and, for lack of a better word, the blue states that feels entirely plausible.
It's a shame, the Ameristan near-future dystopia parts of Fall were quite good, but the virtual world plot became increasingly silly. My mood would pick up whenever I landed on a chapter that got back to the "real world" plot.