believe it or not there are laws.
Arkansas:
"No person who denies the being of a God shall hold any office in the civil departments of this State, nor be competent to testify as a witness in any Court."
Maryland:
"That no religious test ought ever to be required as a qualification for any office of profit or trust in this State, other than a declaration of belief in the existence of God; nor shall the Legislature prescribe any other oath of office than the oath prescribed by this Constitution.”
Mississippi:
"No person who denies the existence of a Supreme Being shall hold any office in this state."
South Carolina:
"No person who denies the existence of a Supreme Being shall hold any office under this Constitution."
Tennessee:
"No person who denies the being of God, or a future state of rewards and punishments, shall hold any office in the civil department of this state."
Texas:
"No religious test shall ever be required as a qualification to any office, or public trust, in this State; nor shall any one be excluded from holding office on account of his religious sentiments, provided he acknowledge the existence of a Supreme Being."