Christian Nation?
It is often proclaimed, incorrectly, by religious people who do not understand the constitution of the United States that The US was founded on Christian principles. Apparently, the 5th Congress of the United States of America would disagree. They unanimously ratified the Treaty of Tripoli which was proudly signed into law by President John Adams. The following quote is from Article 11 of this treaty.
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 tranquillity, of Mussulmen; and, as the said States never entered into any war, or act of hostility against any Mahometan 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.