My antipathy toward JSII and the growing evangelical political activism does not mean that I think Christians should opt out of the political process. In fact, I want to be clear in stating that I recognize the church has a prophetic role to play in relation to political powers. "Speaking truth to power" may have been sloganized by liberals but it is an apt description of the church's responsibility to civil authorities. This is a part of the church's calling as the pillar and ground of the truth.
Beyond this, I believe that American Christians actually have a responsibility to be involved in the political process to promote justice and goodness. Let me try to explain the direction of my thinking about this.
Does the Bible give directives to civil rulers and monarchs? Even the most convinced pietist would, I think, agree. Romans 13:1-7 not only calls for Christians to submit to civil authorities but it also states that civil authorities are under God's authority and are therefore accountable to Him to reward good and punish evil. The Old Testament abounds with examples of God holding rulers accountable for the way they rule. This is true not only of the kings of Judah and Israel but also the kings of pagan nations.
If we lived under a monarchy we would have not only the right but the duty to call on the monarch to govern justly, knowing (whether he acknowledged it or not) that he is God's servant and obligated to reward good and punish evil.
But we do not live in a monarchy. We live in a democratic republic. Who is our civil king? We are. The citizens. We are citizen-kings. Thus we have not only the right but the responsibility to use the political process established by the republic to promote that which is good and restrict that which is evil. Citizen-kings should advocate good laws and decry bad ones. We should hold elected officials responsible for the trust we vest in them. Citizen-kings are responsible to work for justice and goodness in society.