The best I have read thus far (and I have read quite a bit) comes from Inhabitatio Dei.  A quote:

As far as I can see there is little, if any possibility of a truly non-messianic politics in America, at least on the macro-scale. Our work in our wider communities must, I think take some other form in the years to come, focusing on fostering local economies, generating local bodies of political discourse, and fostering community development initiatives that take place in concrete and sustainable ways.

Check out the whole post here.