"It is apprehended that Jews, [Muslims], pagans, etc., may be elected to high offices under the government of the United States. Those who are [Muslims], or any others who are not professors of the Christian religion, can never be elected to the office of President or other high office, [unless] first the people of America lay aside the Christian religion altogether, it may happen. Should this unfortunately take place, the people will choose such men as think as they do themselves."
Governor Samuel Johnston Elliot’s Debates, Vol. IV, pp 198-199, July 30, 1788 at the North Carolina Ratifying Convention