The media gives the impression that only moderate Republicans are intelligent. The truth is that the dumbest spot on the political continuum is the center.
Using data on the GSS vocabulary test, I created an IQ score for all respondents. I've listed the mean IQ for those who voted for McCain, Obama, and those who describe themselves as moderates (sample size = 944).
The difference between people who voted for McCain and self-described moderates is statistically significant.