Originally Posted by knot_e_lady

John Adams, the second U.S. President rejected the Trinity, the deity of Christ, and became a Unitarian. It was during Adams' presidency that the Senate ratified the Treaty of Peace and Friendship with Tripoli, which states in Article XI that:

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 arrising from religious opinions shall ever produce an interruption of the harmony existing between the two countries. (Charles I. Bevans, ed. Treaties and Other International Agreements of the United States of America 1776-1949. Vol. 11: Philippines-United Arab Republic. Washington D.C.: Department of State Publications, 1974, p. 1072).

This treaty with the Islamic state of Tripoli had been written and concluded by Joel Barlow during Washington's Administration. The U.S. Senate ratified the treaty on June 7, 1797; President Adams signed it on June 10, 1797 and it was first published in the Session Laws of the Fifth Congress, first session in 1797. Quite clearly, then, at this very early stage of the American Republic, the U.S. government did not consider the United States a Christian nation.