I'm going against the grain here by saying "Church is nowhere to be preaching Politics".
1st ammendment! Of course it is, if it is done tactfully and a in a Christian (Ephesians 14 Way). Althought the primary purpose of the church is to the light of Christ to the world, part of that mission it to stand up for right-truth in society when necessary: Oh and it would be -irresponsible- for a Christian with a true faith in God -not- to become involved in the world-issues around him...
According to our founders a government is ordained by God as is His church. Neither has jurisdiction over the other. That is why churches are tax-exempt because the state does not have jurisdiction over them. Read congress shall make NO law. The IRS is violating this founding principle by limiting what can and cannot be preached from the pulpit.
Note also in the Christian world view - this is God's kingdom and his people are disciple the nations. Political talk to be sure, but from a purely ethical viewpoint all laws are by their very nature standards of ethics. If God does not define the standards of right and wrong then man, in opposition to God, becomes a tyrant over his fellow men.
To quote Benjamin Franklin "Either you will be governed by God or by-god you will be governed..."
The church is the appointed minister of God's revealed law, it is utter foolishness to think that we would be better off with man's arbitrary standards.