From the book, Doubt: A History, by Jennifer Michael Hecht:
As second president of the United States, Adams signed into law the Treaty of Tripoli (1797), which declares that “the government of the United States is not, in any sense, founded on the Christian religion” and is in no way an enemy to Muslims. On this basis “it is declared…that no pretext arising from religious opinion shall ever produce an interruption of the harmony existing between the two countries.” Further, “The United States is not a Christian nation any more than it is a Jewish or a Mohammedan nation.” It was carried unanimously by the Senate.
I just have a hard time believing that a treaty containing such language would be passed at all today, let alone unanimously!
I could even see the Okie delegation storming out in protest.