No. Key players in the founding of America—such as Jefferson, Paine, and Franklin—were not Christians. They were Deists and religious skeptics. And other icons of America’s cultural history—people like Abraham Lincoln and Emily Dickinson—were agnostics with a lot of emotional ambivalence toward the Bible and Christianity.
Further, the biblical model of political governance is monarchy: the divine right of kings carried forth via a bloodline. Think of King David to “King Jesus.” The Gospel of Matthew begins with a geneology, not an election. By contrast, the models on which America was founded were Greek democracy and the Old (Roman) Republic. Rome for a time was controlled, not by an emperor, but by elected senators. This was the ancient model that the American Founders aspired to—not anything out of the Bible.
America is the “New Republic” (following Rome) and a democracy (following Greece).
And so America is not a Christian country, and never has been. It is a nonsectarian democratic Republic. It’s governing model is derived from ancient Greco-Roman sources and in reaction to the Judeo-Christian monarchical model that was then present in England. The Founders, in violation of St Paul’s admonishment to obey all authorities placed over us by God, rebelled against the divinely installed monarch, King George III. In becoming revolutionaries enamored of free-thinking Enlightenment ideals and Greco-Roman models of self-governance, they were in rebellion against both the biblical God and a Christian sovereign.
Our country’s Greco-Roman roots can be seen in the architecture that dots the nation’s capital: the chief buildings and monuments are all after Greco-Roman models. Had there been a Judeo-Christian architectural style at work in our nation’s capital, we might have seen a great profusion of crosses, cherubims, kingly thrones, and altars on display. Obviously, we don’t see this.
Know-nothing fundamentalists like Sarah Palin have been successful in spreading about a revisionist “Christian nation” meme that bears little resemblance to America’s actual lineage and evolution. And the meme functions as cultural code to other right-wing religious authoritarians ignorant of, and indifferent toward, any serious recounting of intellectual history.