Gibbons v. Ogden · ¶135

Until such laws have been tested by exceptions to their constitutionality, the argument certainly wants much of the force attributed to it; but admitting their constitutionality, they present only the familiar case of punishment inflicted by both governments upon the same individual. He who robs the mail, may also steal the horse that carries it, and would, unquestionably, be subject to punishment, at the same time, under the laws of the State in which the crime is committed, and under those of the United States. And these punishments may interfere, and one render it impossible to inflict the other, and yet the two governments would be acting under powers that have no claim to identity.

U. S. Reports, bound volume
U. S. Reports, volume 22, at 1 (Library of Congress) · transcription: Caselaw Access Project
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