Two articles for your perusal this Lord’s Day, both from the indomitable Michael Horton. (Included are excerpts from each article.)

http://www.whitehorseinn.org/blog/2012/03/30/not-your-religion-in-politics-but-mine/

“As secularists would have it, religious convictions should play no role in shaping the moral vision of voters and political leaders. Of course, this is itself a religious test. Violating at least implicitly the free exercise of religion, secularists assume that their own practically if not theoretically atheistic worldview should be the established religion.”

http://www.whitehorseinn.org/blog/2012/03/31/in-gods-name/

“To conclude: Christians, of all people, should be concerned about the pressing issues in culture and society today. However, even in the same church, where people share the same faith, worldview, and values, there will be different applications, policies, and agendas.”

Enjoy!