Is the US a Christian country
No - Why
Avalon Project - The Barbary Treaties 1786-1816 - Treaty of Peace and Friendship, Signed at Tripoli November 4, 1796
Was America Founded As A Christian Nation? - ForbesARTICLE 11.
As the government of the United States of America is not in any sense founded on the Christian Religion,-as it has in itself no character of enmity against the laws, religion or tranquility of Musselmen,-and as the said States never have entered into any war or act of hostility against any Mehomitan nation, it is declared by the parties that no pretext arising from religious opinions shall ever produce an interruption of the harmony existing between the two countries.
As historian John Fea notes, “If the Treaty of Tripoli is correct, and the United States was not ‘founded on the Christian religion,’ then someone forgot to tell the American people… The idea that the United States is a ‘Christian nation,’ has always been central to American identity.” But debate rages over whether the Founders were Deists and why the Constitution bears no mention of God.