Really? You didn't hear about it? It was all the rage a while back. Moreover, you can just see it with your own eyes. Scan the crowds next time you see a Trump rally, and compare it to the people who show up to hear Sanders. It's just obvious.

https://www.cambridge.org/core/services/aop-cambridge-core/content/view/D5214D0CAE37EE5947B7BF29762547EE/S0730938417000181a.pdf/effects_of_physical_attractiveness_on_political_beliefs.pdf

Utilizing measures of attractiveness across multiple surveys, we examine the relationship between attractiveness and political beliefs. Controlling for socioeconomic status, we find that more attractive individuals are more likely to report higher levels of political efficacy, identify as conservative, and identify as Republican. These findings suggest an additional mechanism for political socialization that has further implications for understanding how the body intertwines with the social nature of politics.

Also, http://www.nationaleconomicseditorial.com/2017/05/25/weak-men-prefer-socialism/

A new study published in the Evolution and Human Behavior journal, by researchers at Brunel University, London, found that physically weaker men are more likely to favor socialism than stronger men.

The study sampled 171 men, and looked at their height, weight, bicep circumference, and overall physical strength—then they compared these traits with the men’s views on the redistribution of wealth, and income inequality.

They found that physical weakness was correlated to a preference for socialism.