Here's a graph with voting patterns by economic attainment.
The red states are McCain/ Republican states.
The blue are Obama/Democratic states.
This is each income group voted in the last election and who the state winner would be if they counted only those above 150k and so on down to "low income" results.
Class lines that had been blurred around politics are not so blurred, it appears. Actual number of purple states would be a different map.