A few more words, and we shall be in a condition to answer the question which stands at the head of this chapter. Being a legal question, it will depend entirely upon the constitutional right the Southern States may have had to withdraw from the Union, without reference to considerations of expediency, or of moral right; these latter will be more appropriately considered, when we come to speak of the causes which impelled the Southern States to the step. I have combated many of the arguments presented by the other side, but a few others remain to be noticed.
It has been said, that, admitting that the Constitution was a federal compact, yet the States did in fact cede away a part of their sovereignty, and from this the inference has been deduced, that they no longer remained sovereign for the purpose of recalling the part, which had been ceded away. This is a question which arises wholly under the laws of nations. It is admitted, that the States were independent sovereignties, before they formed the Constitution. We have only, therefore, to consult the international code, to ascertain to what extent the granting away of a portion of their sovereignty affected the remainder. Vattel, treating of this identical point, speaks as follows: "Several sovereign and independent States may unite themselves together by a perpetual confederacy, without ceasing to be, each individually, a perfect State. They will, together, constitute a federal republic; their joint deliberations will not impair the sovereignty of each member, though they may, in certain respects, _put some restraint upon the exercise of it_, in virtue of _voluntary_ engagements." That was just what the American States did, when they formed the Federal Constitution; they put some voluntary restraint upon their sovereignty, for the furtherance of a common object.
If they are restrained, by the Constitution, from doing certain things, the restraint was self-imposed, for it was they who ordained, and established the instrument, and not a common superior. They, each, agreed that they would forbear to do certain things, if their copartners would forbear to do the same things. As plain as this seems, no less an authority than that of Mr. Webster has denied it; for, in his celebrated argument against Mr. Calhoun, already referred to, he triumphantly exclaimed, that the States were not sovereign, because _they were restrained of a portion of their liberty by the Constitution_. See how he perverts the whole tenor of the instrument, in his endeavor to build up those manufactories of which we spoke in the last chapter. He says: "However men may think this ought to be, the fact is, that _the people of the United States_ have chosen to _impose control_ on State sovereignty. There are those, doubtless, who wish that they had been left without restraint; but the Constitution has ordered the matter differently. To make war, for instance, is an exercise of sovereignty, but, the Constitution declares that no State shall declare war. To coin money is another act of sovereign power; but no State is at liberty to coin money. Again, the Constitution says, that no sovereign State shall be so sovereign, as to make a treaty. These prohibitions, it must be confessed, are a control on the State sovereignty of South Carolina, as well as of the other States, which does not arise from her feelings of honorable justice."