In the 1990's, the U.S. saw one of the largest periods of migration to its shores in its history. This surge of immigrants can be classified predominantly as Latino or Asian, which will inevitably result in demographic changes within the country. The largest proportion of immigrants claim Mexico as their country of origin, and according to the U.S. Census Bureau, Hispanics now represent the country's largest minority population. Given these facts, it is important to examine a body of literature that warns of the "balkanization" of America and suggests an inability of this new wave of immigrants to assimilate into American society. Previous research on attitudes towards immigrants has found both cultural and economic indicators to be important determinants of public opinion on this issue. I will expand this research by examining how the public perception of the ability of immigrants to assume an "American" identity and assimilate into society will affect attitudes towards immigrants. My primary research questions are: (1) How do different conceptions of national identity affect attitudes towards immigrants? (2) How do perceptions of the ability of immigrant groups to integrate into American society affect restrictionist views on immigration policy? (3) What group and individual-level characteristics determine differing levels of support for the dimensions of American national identity? My findings suggest that the weight attributed to three distinct dimensions of national identity conditions attitudes towards immigrants and their incorporation into American society.