Peter Leithart is a man I greatly respect, even when I disagree with him, which is not often. Here is a wonderful interview where he lays out how he thinks the Church should intersect the world, particularly politics. What I liked about this interview is the practical suggestions Leithart gives. He can be long on theory, short on practice. But here he gives many excellent ideas as to how a local pastor can see the church as a political body. The interview is well worth your time. Note especially the strong stance he takes against abortion and sodomy and the fact that he believes all men, including rulers, should be called upon to submit to Jesus as Lord.