The Principles of the Roman Catholic church and those of the United States, Incompatable

Nothing is plainer than that, if these principles [those of the papacy and the Roman Catholic church] should prevail here, our institutions [those of the United States of America] would necessarily fall. The two can not exist together. They are in open and direct antagonism with the fundamental theory of our Government, and of all popular government everywhere.

Thompson, Richard Wigginton, The Papacy and the Civil Power, New York: Harper & Brothers, 1876, p. 209.