Income vs. 2012 presidential vote
As long as we're using data to break apart partisan narratives, I humbly submit this here scatter plot comparing income and presidential vote by county. The area of each dot is proportional to county population. Data is due to the US Census and Politico, which I gleefully scraped for county-by-county poll returns.
The Republican narrative of class warfare is, at very least, not evident in this diagram. There is basically no correlation beween a county's median income and how it voted in the election. Very poor counties appear polarized; a county with median income below 25K will vote 80% one way or another, but rarely in between. Likewise, wealthy counties pulled towards the center with a slight tilt towards the democrats.