The report notes that white middle class voters (once again, earning $30,000 - 75,000) behaved in 2004 much the same way as did their wealthier brethren, and that as their income increases, Hispanic voters are much less likely to vote for Democrats.
The only middle class voters that Democrats can count on are blacks, unmarried
women, and those with a graduate education – roughly one-third of the middle class
electorate. This group of middle class voters kept Democrats within shouting distance
of Republicans in the last election.
The behavior of graduate educated voters--the only middle class constituency that doesn’t obviously vote for Democrats for reasons of history or (perhaps) economic insecurity reminds us of the importance of encouraging intellectual pluralism on America’s campuses. (I know it’s more complicated than that, but at moment, I’m out of blogging time.)
Update: Mike also called my attention to this article at NRO.