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Arizona v. United States

2012 United States Supreme Court case

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 26, 2026
Entity authorityQ4791505 ↗
Source-derived summary

Arizona v. United States, 567 U.S. 387 (2012), was a United States Supreme Court case involving Arizona's SB 1070, a state law intended to increase the powers of local law enforcement that wished to enforce federal immigration laws. The issue is whether the law usurps the federal government's authority to regulate immigration laws and enforcement. The Court ruled that sections 3, 5(C), and 6 of S. B. 1070 were preempted by federal law but left other parts of the law intact, including a provision that allowed law enforcement to investigate a person's immigration status.

Background

On April 23, 2010, Arizona Governor Jan Brewer signed into law SB 1070, which supporters dubbed the "Support Our Law Enforcement and Safe Neighborhoods Act". It made it a state misdemeanor for an illegal immigrant to be in Arizona without carrying registration documents required by federal law; authorized state and local law enforcement of federal immigration laws; and penalized those found to be knowingly sheltering, hiring, and transporting illegal immigrants.

The bill's passage immediately sparked constitutional concerns over potential civil rights violations and encouraging of racial profiling. Tens of thousands of people demonstrated against the law in over 70 U.S. cities on May 1, 2010 (International Workers' Day). A rally in Los Angeles, attended by Cardinal Roger Mahony of the Roman Catholic Church, attracted between 50,000 and 60,000 people, with protesters waving Mexican flags and chanting "Sí se puede." The city had become the national center of protests against the Arizona law. Around 25,000 people were at a protest in Dallas, and more than 5,000 were in Chicago and Milwaukee.

Editorial summary

Begin with the source’s own compact description: “Arizona v. United States” is 2012 United States Supreme Court case. The dossier treats that line as a proposition to test through Arizona, United and States, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—2012, 1070, 2010—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Arizona, United and States is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “2012 United States Supreme Court case” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 26, 2026. The linked authority identifier is Q4791505. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2012, 1070 and 2010.

Critical limits

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  2. Expand the search: follow Arizona v. United States primary sources, Arizona v. United States archive and Arizona research across catalogues and specialist indexes.
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Source & attribution

This entry incorporates text from “Arizona v. United States” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.