We are to be good stewards of all that God has given us – including our citizenship.
In Romans 13:1-2, the Word tells us, “Be a good citizen. All governments are under God. Insofar as there is peace and order, it's God's order. So live responsibly as a citizen. If you're irresponsible to the state, then you're irresponsible with God, and God will hold you responsible.”
Our form of government is based on “we, the people.” We are not subjects of benevolent (or not so benevolent) leader. God has given us the privilege of living in the United States, and just as with any other good gift or talent from God, we are called to be good stewards. The blessing carries with it a responsibility.
In Matthew 25 the Master of the servant who has best used his talent says to him, “‘Well done, good and faithful servant. You have been faithful over a little; I will set you over much. Enter into the joy of your master.’” As Americans, your vote IS your ‘talent;’ use it wisely.
The freedom we have is no small thing, and in our Constitutional Republic, citizens must participate in order for our governance to reflect Godly leaders.