Here's Obama versus McCain by educational attainment. It's close in every bracket except those with graduate degrees, where Obama has a big edge. When you look at these numbers it's important to recall that the largest bloc of people with grad school diplomas are public school teachers. It sometimes gets glossed as a cohort of college professors, but overall the number of people with professionally oriented degrees (teachers, lawyers, dentists, journalism school graduates, etc.) far, far outnumbers PhDs in the United States.
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