Page:Joseph Story, Commentaries on the Constitution of the United States (1st ed, 1833, vol III).djvu/101

 CH. XXII.] directed to such executive, or to any subordinate officers of the militia. It is not, however, to be understood, that the state executive is in any case bound to leave his executive duties, and go personally into the actual service of the United States.

§ 1208. The power to govern the militia, when in the actual service of the United States, is denied by no one to be an exclusive one. Indeed, from its very nature, it must be so construed; for the notion of distinct and independent orders from authorities wholly unconnected, would be utterly inconsistent with that unity of command and action, on which the success of all military operations must essentially depend. But there is nothing in the constitution, which prohibits a state from calling forth its own militia, not detached into the service of the Union, to aid the United States in executing the laws, in suppressing insurrections, and in repelling invasions. Such a concurrent exercise of power in no degree interferes with, or obstructs die exercise of the powers of the Union. Congress may, by suitable laws, provide for the calling forth of the militia, and annex suitable penalties to disobedience of their orders, and direct the manner, in which the delinquents may be tried. But the authority to call forth, and the authority exclusively to govern, are quite distinct in their nature. The question, when the authority of congress over the militia becomes exclusive, must essentially depend upon the fact, when they are to be deemed in the actual service of the United States. There is a clear distinction between calling forth the militia, and their being in