Courtesy of John C.Baez, these diagrams appear to demonstrate a strong correlation in the US between a tendency to vote Republican and a lack of education. The first diagram indicates which US states voted for Obama (blue), and which states voted for McCain (red).
The second diagram represents the proportion of people with less than 9 years of education.
One exception I spotted was New Mexico, which has quite poor education levels, but voted for Obama. This, however, can perhaps be explained by the fact that Obama cultivated a large portion of the hispanic vote.