This chapter examines the politics of American immigrant fiction in the twentieth century, a time period that saw three large waves of immigration. The first took place between 1880 and 1924 and consisted primarily of European immigrants and Asian immigrants. The second wave ranged from 1924 to 1965 and was much smaller than the first, largely due to shifting political views toward immigrants which resulted in legislation that significantly restricted the flow of newcomers. The third wave was triggered in 1965 by another change in both national attitude and policy and it lasted into the early decades of the twentieth century. During this time, the immigrant novel reflected political realities through its portrayal of how migration to the United States brought success for some and marginalization for others. The genre confronted the myth that all newcomers enjoy equal potential to achieve the “American Dream” by exposing how racialization, the process of assigning individuals to categories based on characteristics such as skin color or facial features, significantly determined inclusion or exclusion.