The Left Handed Bias: A Surprising Reflection of Our Identity Politics Research suggests that left handed people are more likely to hold left leaning views, but the connection between handedness and politics is not as straightforward as it seems.
In fact, studies indicate that this association may be due more to identity based mechanisms than any profound neurological differences.
In Western countries, where the terms "left" and "right" have strong symbolic connotations, being left handed appears linked with progressive values.