There is this reality that at one time we were aliens and strangers and outsiders to the Kingdom of Christ. But now, we have been brought into that kingdom by the work of Christ, making us aliens and strangers in this world. Therefore, the Christian sojourner has to wrestle with the tension between being a citizen of the Kingdom of Christ and a citizen of a kingdom in this world. Scripture helps us understand authority, navigate this tension, and glorify King Jesus's authority above all other authorities.

Episode on Church and State that John did with the Covenant Conversation guys: 

https://podcasts.apple.com/us/podcast/covenant-conversations/id1412764902?i=1000500073709