Nice try again to justify voting for that which is against Christ.
Governments are ordained by God (Rom. 13:1-5) and are to be ministers of righteousness for God. Paul wrote when the ungodly Roman empire was ruling over the face of the earth. Our government is not as bad as the government in rule when Paul wrote these words
In fact.......
The declaration of Independence is based upon the definition that our "rights" come from "nature and nature's God" and that the purpose of government is "to secure these rights." That declared definition of "rights" and that declared purpose for government is completely in harmony with Romans 12:1-5.
Hence, as a Christian you can Biblically support those two basic principles found in our constitution.
Obama opposes those two basic principles while Romney supports them.
However, regardless of who is running to direct our nation, you have the Christian obligation to obey Romans 12:1-5 whether it is a Roman Empereor who claims to be a godman or whether it is an American President. You have the responsibility to support light over darkness and just as you have a responsibility to support your brethren in the Lord and not one of them is sinless either. You have an obligation to be light and salt in all of your actions as a Christian and as a citizen in keeping with the command in Romans 13:1-5.
However, what you are doing is hiding behind irresponsibility under a pretense of righteousness.