Francis Newton Thorpe,
The Essentials of American Constitutional Law
“ Naturalization is an artificial birth made possible by the will of sovereignty. It is effected by the operation of law,—and in America, by operation of statutory law only. Congress has not the exclusive power to pass naturalization laws, but it has the exclusive power “to establish a uniform rule of naturalization.”481 The power exercised here is suggested in the word “uniform.”482 Congress has seen fit to vest the exercise of this power in certain courts of law. Strictly speaking, the exercise of the function, in any of its aspects, is not essentially judicial. ”
