Immigration and the standard of living
Old stock Americans often thought that others were strange, inferior and potentially disloyal. . . . Labor violence, such as that occurring during the railroad disturbances of 1877, . . . crowded slums in the nation’s fast growing cities, and industrial strikes also created uneasiness about the stability of American society. . . . Many others, reformers and non-reformers, feared economic impact of immigration…they played the immigrants for lowering the standard of living.
Source: Leonard Dinnerstein, Roger L. Nichols, and David M. Reimers, Natives and Strangers: A Multicultural History of Americans (New York: Oxford University Press, 1971), p. 220-21.