The ACLU works to ensure that all persons in our country, including both citizens and non-citizens, enjoy our Constitution’s fundamental guarantees of due process and equal protection. One problem with laws that target immigrants is that they have a racial disparate impact, because most immigrants are racial and ethnic minorities. In the 1970s, we successfully litigated to end a federal practice of detaining persons of Hispanic appearance on the grounds that they might be undocumented immigrants. In recent years, we have successfully lobbied against state laws that would have required state officials to enforce federal immigration laws. We also monitor efforts by state and local law enforcement officials to enforce federal immigration laws.

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