A nice statistics ahowing how any state where the average iq was above 100 voted for Kerry, and Avery state where average iq was below 99 voted for Bush.
F. Kooti, N. Hodas, and K. Lerman. Proceedings of the eighth International AAAI Conference on Weblogs and Social Media, page 266--274. AAAI, AAAI Press, (June 2014)