Personality traits doubled the variance accounted for (4% to 9%) indicating that Open, more Agreeable people were more Left-Wing and Introverted, more Conscientious people more Right-Wing

Personality and political orientation. Adrian Furnham, Mark Fenton-O'Creevy. Personality and Individual Differences, Volume 129, 15 July 2018, Pages 88–91. https://doi.org/10.1016/j.paid.2018.03.020

Highlights
•    Personality and demographic factors were correlated with Left-Right political orientation (PO).
•    Better educated, less religious, females of higher social class were more Left-Wing.
•    Personality traits doubled the variance account for (4% to 9%).
•    Open, Agreeable people were Left-Wing and Introverted, Conscientious people Right-Wing.

Abstract: This study examined the incremental validity of the Big-Five personality traits over primarily demographic factors in predicting Left-Right political orientation (PO) in a large British adult sample. Gender and trait Openness was most strongly correlated with PO. The regression indicated that females who were better educated, less religious and of higher social class were more Left-Wing. Personality traits doubled the variance accounted for (4% to 9%) indicating that Open, more Agreeable people were more Left-Wing and Introverted, more Conscientious people more Right-Wing. Agreeableness and Neuroticism showed an interaction with social class, such that for high social class, Left-Wing orientation increased with Agreeableness (but not for low social class); and for high social class, Left-Wing orientation increased with Neuroticism, whilst for low social class, Right-Wing orientation increased with Neuroticism.

Keywords: Political orientation; Personality traits; Demographic variables