Politically speaking, I am a conservative because I am a Christian. Not that Christianity is political, but when it comes to how I vote and what I believe about my national citizenship, my Christian faith absolutely requires a consistent conservative political, economic, and social position because it is compatible with biblical truth.
I cannot think of one single liberal position, objective, concept, belief, persuasion, tenet, ideology, principle, solution, theory, viewpoint, or conviction of the left in any matters of governance, economics, environmentalism, social issues, or even religion that are not diametrically opposed to the teachings of biblical Christianity. In fact, I think the term "liberal Christian" is an oxymoron.
So there's the challenge. If you can think of any position of the left that is complimentary to a biblical Christian worldview, please let me know. And, if you are successful, I will publicly repent here on my blog.