“Lincoln likely concluded – was, as Jackson had put it, “fallacious” in its justifications and, “in direct violation of their duty as citizens of the United States, contrary to the laws of their country, subversive of its Constitution, and having for its object the destruction of the Union.” As Jackson had bluntly concluded: “Disunion by armed force is treason.”

“Lincoln likely concluded – was, as Jackson had put it, “fallacious” in its justifications and, “in direct violation of their duty as citizens of the United States, contrary to the laws of their country, subversive of its Constitution, and having for its object the destruction of the Union.” As Jackson had bluntly concluded: “Disunion by armed force is treason.”

— Harold Holzer