Chief Justice Marshall early stated the dictum that "a naturalized citizen * * * become[s] a member of the society, possessing all the rights of a native citizen, and standing, in the view of the Constitution, on the footing of a native. The Constitution does not authorize Congress to enlarge or abridge those rights. The simple power of the national legislature is, to prescribe a uniform rule of naturalization, and the exercise of this power exhausts it, so far as respects the individual."[1056] A similar idea was expressed in 1946 in Knauer _v._ United States:[1057] "Citizenship obtained through naturalization is not a second-class citizenship. * * * [It] carries with it the privilege of full participation in the affairs of our society, including the right to speak freely, to criticize officials and administrators, and to promote changes in our laws including the very Charter of our Government."[1058] But, as shown above, a naturalized citizen is subject at any time to have his good faith in taking the oath of allegiance to the United States inquired into, and to lose his citizenship if lack of such faith is shown in proper proceedings.[1059] Also, "a person who has become a national by naturalization" may lose his nationality by "having a continuous residence for three years in the territory of a foreign state of which he was formerly a national or in which the place of his birth is situated," or by "having a continuous residence for five years in any other foreign state or states."[1060] However, in the absence of treaty or statute to the contrary effect, a child born in the United States who is taken during minority to the country of his parents' origin, where his parents resume their former allegiance, does not thereby lose his American citizenship provided that on attaining his majority he elects to retain it and returns to the United States to assume its duties.[1061]
Congress' power over naturalization is an exclusive power. A State cannot denationalize a foreign subject who has not complied with federal naturalization law and constitute him a citizen of the United States, or of the State, so as to deprive the federal courts of jurisdiction over a controversy between him and a citizen of a State.[1062] But power to naturalize aliens may be, and early was, devolved by Congress upon state courts having a common law jurisdiction.[1063] Also States may confer the right of suffrage upon resident aliens who have declared their intention to become citizens, and have frequently done so.[1064]