A study conducted in Germany found that men with higher IQs are less inclined to traditional values, but the lead author, psychologist and intelligence researcher Maximilian Krolo of Saarland University, said the researchers did not find these differences among women.
The study is about views, not party affiliation. In US both parties are the same but their voters definitely are not equally conservative. Republican voters wanted their party to be more fascist for a long time (and Trump delivered), democratic voters want their party to be way more progressive than it actually is.