In attempting to think more deeply about the relationship of Faith and Politics, I've run across two programs that have made me re-think some of my preconceptions. Both contain intelligent conservative and progressive Christians discussing these issues, give them a listen:
1) Speaking of Faith: "Evangelical Politics" - The first is an episode of "Speaking of Faith," a program on American Public Radio, where Chuck Colson, Gregory Boyd and Shane Claiborne talk about the relationship between church and state, from the prespective of three generations of evangelicals.
2) White Horse Inn: "Christianity and Politics, Part 1 / Part 2" - Second is a two part talk with two Christians involved in politics, one Democrat and one Republican. D.G. Hart, one of my favorite Christian writers and author of the book: A Secular Faith: Why Christianity favors the Separation of Church and State, joins the talk to explore: What is the role of the church in Politics? The shared opinion here might suprise you.