This condition of immiscibility is likewise as forcibly present in the case of Chinese in the United States as it is generally absent in regard to aliens of the same race and blood as our own. It is the inherent prerogative of sovereignty to take cognizance of such incompatibilities. to provide special conditions for the tolerance of the immiscible element in the national community. Chinese exclusion can be justified on these grounds. and this sovereign right is freely exercised by the United States in the adoption of restrictive or discriminating legislation in regard to any class of alien immigration whenever the exigencies of the public needs demand and to whatever extent they may require. So far from injury having been inflicted upon our growing trade with China by exclusion legislation. our commercial relations have. on the contrary. tended to develop to a remarkable degree. In our diplomatic relations our attitude has been generous and disinterested and free from all suggestion of territorial aggrandizement beyond any other nation.