It might seem a leap too far, but bear with me, because I’m going to attempt to show that genes influence the way you vote. Let’s start at the end and work our way towards the beginning.
Your adopted political ideology strongly influences the way you vote. Certainly, there might be circumstances in which a liberal might vote for a conservative candidate, such as if the liberal candidate was an obvious dud (or the conservative candidate was a shining star), or if the conservative candidate happened to offer a better policies for the present environment (say, being a hawk in a time of war). But, all things being equal, self-identifying liberals vote for liberal candidates and parties.
However, your political ideology isn’t something you come to adopt from out of the blue. We’re not political blank slates. One of the greatest influences on what ideology you adopt is your worldview, which I loosely define as the implicit framework you use to make sense of the world around you.
Your worldview is both descriptive and prescriptive – it helps understand the way the world is, and it’s value-laden, so it helps you understand good and bad, desirable and undesirable. Many empirical and theoretical studies have shown that underneath our political attitudes lie (often unconscious) beliefs about the way the world is.