religion and politics

Hello, I'm looking for some book recs on the subject of the relationship between the Gospel/Christianity to politics, especially contemporary American politics. Specifically, I'm curious about the perils of voting, political parties and their discontents, relation of church/state, social...

This is an issue which I have been wrestling with for quite a while. Obviously, no Reformed Protestant could possibly say that the government can make people Christians. Only God in His grace and mercy can do such a thing. Still, I'm wondering whether this precludes any role whatsoever for the...