Final answer:
Current state laws regarding immigration enforcement involve states moving into the immigration policy domain, although federal immigration laws hold supremacy.
Step-by-step explanation:
The current state laws regarding immigration enforcement in the United States have varying features and approaches. One feature is that states have increasingly moved into the policy domain of immigration since the 1990s.
However, it is important to note that federal immigration laws hold supremacy over state laws.
States' involvement in immigration enforcement is often driven by their interest in preventing undocumented immigrants from accessing public services such as education and welfare benefits.