While Calhoun maintained that in order to make the limitations on the authority of the general government effective it was necessary that a state should have a veto on Federal laws, he did not contend that the verdict of a state should be final. It would still be possible for the general government to override the veto of a state by procuring a constitutional amendment which would remove all doubt as to its right to exercise the power in question. This method of appeal, he argued, was always open to the general government, since it represented and was in the hands of the numerical majority. This would be true, however, only when the party in power had the requisite two-thirds majority in both houses of Congress, or at least controlled the legislatures in two-thirds of the states. Otherwise its control of the general government would not enable it to propose the desired constitutional amendment. With this qualification Calhoun's contention was correct. On the other hand the state could not defend itself against Federal aggression, since, belonging to the minority, it would have no means of compelling the submission of a constitutional amendment involving the point in dispute. The effect of a state veto on an act of Congress would be to compel the latter to choose between abandoning the law in question as unconstitutional and appealing to the constitution-making power in defense of its claim. If it chose the latter alternative and succeeded in having its authority supported by an appropriate constitutional amendment, there was nothing for the state to do but submit, provided that the amendment in question was one clearly within the scope of the amending power. If, as Calhoun assumed, it was the purpose of the Constitution to withhold from a mere majority in control of the general government the power to enact and enforce unconstitutional legislation, the veto of a state would seem to be the only means by which the constitutional rights of a minority of the states could be protected. Calhoun did not question the right of the Supreme Court of the United States to declare an act of Congress null and void, or its right to pass judgment upon the Constitution or the laws of a state when they were attacked as in conflict with the Federal Constitution in a case before it. This right, he contended, belonged to all courts whether federal or state. A decision of the Supreme Court of the United States adverse to the constitution or law of a state was, however, he maintained, binding only on the general government itself and the parties to the suit. As against the state it had no power to enforce its decision.