Preemption — related Supreme Court cases
This page groups Supreme Court cases that involve the constitutional concept “Preemption”. Use it to explore related decisions and see how the same idea shows up across different cases.
“Preemption” is:
Federal law overriding or displacing state law.
Source: Article VI, Clause 2 Where this concept definition/label comes from (for example, a constitutional provision or a reference framework).
Cases
These are cases where this concept was identified as relevant. Click a case to view its summary, holding, and supporting syllabus excerpts.
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Berk v. Choy
20th January 2026
The case involves the preemption of state law by federal procedural rules.
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Doe v. Dynamic Physical Therapy, LLC
8th December 2025
The Court held that a state cannot confer immunity from federal causes of action, indicating federal law preempts state law in this context.
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Pitts v. Mississippi
24th November 2025
The case involves a conflict between a state statute and the Federal Constitution, with the latter taking precedence.
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Martin v. United States
12th June 2025
The case involves the application of federal law over state law in the context of the Federal Tort Claims Act, which is a form of preemption.
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Smith & Wesson Brands, Inc. v. Estados Unidos Mexicanos
5th June 2025
The case involves the application of the Protection of Lawful Commerce in Arms Act (PLCAA), which preempts certain state and federal lawsuits against gun manufacturers.
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Williams v. Reed
21st February 2025
The Court held that the state exhaustion requirement was preempted by federal law, specifically 42 U.S.C. § 1983.
