Two aspects of immigration reform that get shoved under the carpet -

1. Wages: People are frightened that if all the undocumented people become citizens, they will go out, get jobs, and depress wages, especially at the low end. The fact is, undocumented people are already working, and precisely because they are undocumented, they are lowering wages. Given the protection of citizenship, they would be able to organize to demand better treatment.

2. Disenfranchisement: We hear a lot about Republican fears of Latinos supporting Democrats. What we don't hear about is this: the United States economy depends on the young workers arriving as immigrants. Our failure to recognize this and provide a means for authorized entrance to the US means that we have developed a large underclass denied the right to vote.