EN
This essay describes the on-going ambivalence in the immigration policy America has instituted in its history. On the one hand one guiding philosophy has been part of its national ethos, that is to act as the world's democratic homeland for the oppressed in its first hundred years after 1776. However on the other hand, since the 1880s that gracious openness has clashed with opposite restrictions in statutes, New obstacles to acceptance have arisen even barring at times aliens of certain foreign cultures. Now the arrival have stimulated fears of threatening our way of live, our national security, and weakening out vaunted cultural values. In the more recent era of the twentieth and twenty-first century, the latter policy of nativists has been dominant as the country sees the coming of more foreign, non-whites some of whom have arrived illegally. Meanwhile the administration of the hardening policy has been a failure with corruption and low morale of immigration officials. The result has been interminable controversy between liberals and restrictionists.