There’s a very interesting comment thread going on over at First Things "Evangel" blog (a new group blog that our own Mark Olsen is contributing to) dealing with how Christians deal with the political realm. Clearly I’m for engaging the world (in the world but not of it, as it were), but the writer Frank Turk, taking cues from the apostle Paul, is of a different opinion. Other commenters have weighed in, in a very thought-provoking back-and-forth. Additionally, another blogger, Matthew Anderson, has taken up the opposite side of the issue.
I encourage you to take a look at these, regardless of your position. And the "Evangel" comes highly recommended.