Will the Constitution be destroyed? No: it will be held inviolate by this people; and, as Joseph Smith said, "The time will come when the destiny of the nation will hang upon a single thread. At that critical juncture, this people will step forth and save it from the threatened destruction." It will be so.
Journal of Discourses 7:15 (July 4, 1854)
Journal of Discourses/Volume 7/Celebration of the Fourth of July