Among the powers unquestionably possessed by the several States, was that of determining what persons should and what persons should not be citizens. It was practicable to confer on the Government of the Union this entire power. It embraced what may, well enough for the purpose now in view, be divided into three parts. _First_: The power to remove the disabilities of alienage, either by special acts in reference to each individual case, or by establishing a rule of naturalization to be administered and applied by the courts. _Second_: Determining what persons should enjoy the privileges of citizenship, in respect to the internal affairs of the several States. _Third_: What native-born persons should be citizens of the United States. The first-named power, that of establishing a uniform rule of naturalization, was granted; and here the grant, according to its terms, stopped. Construing a Constitution containing only limited and defined powers of government, the argument derived from this definite and restricted power to establish a rule of naturalization, must be admitted to be exceedingly strong. I do not say it is necessarily decisive. It might be controlled by other parts of the Constitution. But when this particular subject of citizenship was under consideration, and, in the clause specially intended to define the extent of power concerning it, we find a particular part of this entire power separated from the residue, and conferred on the General Government, there arises a strong presumption that this is all which is granted, and that the residue is left to the States and to the people. And this presumption is, in my opinion, converted into a certainty, by an examination of all such other clauses of the Constitution as touch this subject. I will examine each which can have any possible bearing on this question.