Based on information in the supplemental reading "american political culture," which aspect of the contemporary immigration issue was almost completely absent in the past?

The difference between legal and illegal migration is not taken into account and neither does it refer to the problems that this brings for the whole society. We can see that illegal immigration to the United States, also referred to as undocumented immigration, is the situation in which foreigners from the United States enter the country without the permission of the federal government (for example, a visa) in violation of immigration laws. of the United States, or also remaining in the country beyond the expiration date of the visa, also in contravention of the aforementioned norm.

explanation:

may i ask what challenges?