The Washington Post summarizes findings of a research report in the Journal of Public Economics. The research shows conservative politicians in the U.S., Australia, and Europe are more attractive people than their liberal or progressive opponents.
The findings are logical; conservatives generally favor less government meddling in society. Attractive people have been shown to have better life outcomes - earn more, achieve more, be more popular. Presumably they'd see less need for social change, experience life as more fair (to themselves at least).
Politics has been slandered as "showbiz for ugly people." Perhaps this is more true on the left than on the right, at least in recent decades.