After a couple minutes of googling, I still have no idea which "study" you are referring to. I figured that its rather common knowledge that the poorest, least educated, most obese states are also the conservative strongholds, but if you want hard science I can offer you this look at exit polls that confirms conservatives have the least education, and this study that confirms obesity is correlated with lower education. As the the most conservative and absurd candidate, I am quite sure that Trump is attracting the fattest and stupidest crowds in America.