An entire consolidation of the States into one complete national sovereignty would imply an entire subordination of the parts; and whatever powers might remain in them, would be altogether dependent on the general will. But as the plan of the convention aims only at a partial union or consolidation, the State governments would clearly retain all the rights of sovereignty which they before had, and which were not, by that act, EXCLUSIVELY delegated to the United States. This exclusive delegation, or rather this alienation, of State sovereignty, would only exist in three cases: where the Constitution in express terms granted an exclusive authority to the Union; where it granted in one instance an authority to the Union, and in another prohibited the States from exercising the like authority; and where it granted an authority to the Union, to which a similar authority in the States would be absolutely and totally CONTRADICTORY and REPUGNANT. I use these terms to distinguish this last case from another which might appear to resemble it, but which would, in fact, be essentially different; I mean where the exercise of a concurrent jurisdiction might be productive of occasional interferences in the POLICY of any branch of administration, but would not imply any direct contradiction or repugnancy in point of constitutional authority. These three cases of exclusive jurisdiction in the federal government may be exemplified by the following instances: The last clause but one in the eighth section of the first article provides expressly that Congress shall exercise “EXCLUSIVE LEGISLATION” over the district to be appropriated as the seat of government. This answers to the first case. The first clause of the same section empowers Congress “TO LAY AND COLLECT TAXES, DUTIES, IMPOSTS AND EXCISES”; and the second clause of the tenth section of the same article declares that, “NO STATE SHALL, without the consent of Congress, LAY ANY IMPOSTS OR DUTIES ON IMPORTS OR EXPORTS, except for the purpose of executing its inspection laws.” Hence would result an exclusive power in the Union to lay duties on imports and exports, with the particular exception mentioned; but this power is abridged by another clause, which declares that no tax or duty shall be laid on articles exported from any State; in consequence of which qualification, it now only extends to the DUTIES ON IMPORTS. This answers to the second case. The third will be found in that clause which declares that Congress shall have power “to establish an UNIFORM RULE of naturalization throughout the United States.” This must necessarily be exclusive; because if each State had power to prescribe a DISTINCT RULE, there could not be a UNIFORM RULE.