Page:Joseph Story, Commentaries on the Constitution of the United States (1st ed, 1833, vol I).djvu/385

 CH. IV.] § 374. In order to clear the question of all minor points, which might embarrass us in the discussion, it is necessary to suggest a few preliminary remarks. The constitution, contemplating the grant of limited powers, and distributing them among various functionaries, and the state governments, and their functionaries, being also clothed with limited powers, subordinate to those granted to the general government, whenever any question arises, as to the exercise of any power by any of these functionaries under the state, or federal government, it is of necessity, that such functionaries must, in the first instance, decide upon the constitutionality of the exercise of such power. It may arise in the course of the discharge of the functions of any one, or of all, of the great departments of government, the executive, the legislative, and the judicial. The officers of each of these departments are equally bound by their oaths of office to support the constitution of the United States, and are therefore conscientiously bound to abstain from all acts, which are inconsistent with it. Whenever, therefore, they are required to act in a case, not hitherto settled by any proper authority, these functionaries must, in the first instance, decide, each for himself, whether, consistently with the constitution, the act can be done. If, for instance, the president is required to do any act, he is not only authorized, but required, to decide for himself, whether, consistently with his constitutional duties, he can do the act. So, if a proposition be 44