There is a belief abroad in many conservative circles that the U.S. is “a Christian nation”. This belief is found in perhaps its most extreme form in the Mormon doctrine that the Constitution of the United States is a divinely inspired document. Less extreme versions hold that Christian piety was an shaping influence on the thinking and writing of the Founding Fathers, and Christianity therefore has (or ought to have) a privileged position in the political and cultural life of the U.S.
The Mormon doctrine is unfalsifiable. But claims about the beliefs and intentions of the Founding Fathers are not, and the record is clear: they explicitly rejected the establishment of Christianity as the preferred or natural religion of their infant nation.