"From the foregoing it is manifest, beloved son, that we are not able to give approval to those views which, in their collective sense, are called by some "Americanism." But if by this name are to be understood certain endowments of mind which belong to the American people, just as other characteristics belong to various other nations, and if, moreover, by it is designated your political condition and the laws and customs by which you are governed, there is no reason to take exception to the name. But if this is to be so understood that the doctrines which have been adverted to above are not only indicated, but exalted, there can be no manner of doubt that our venerable brethren, the bishops of America, would be the first to repudiate and condemn it as being most injurious to themselves and to their country. For it would give rise to the suspicion that there are among you some who conceive and would have the Church in America to be different from what it is in the rest of the world."
-Leo XIII, Testem Benevolentiae Nostrae