Supreme Court Cases

Cases

These are cases where this concept was identified as relevant. Click a case to view its summary, holding, and supporting syllabus excerpts.

• Berk v. Choy 20th January 2026
  The case involves the preemption of state law by federal procedural rules.
• 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.
• Pitts v. Mississippi 24th November 2025
  The case involves a conflict between a state statute and the Federal Constitution, with the latter taking precedence.
• 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.
• 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.
• 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.
• Moyle v. United States 27th June 2024
  The case involves a conflict between federal law (EMTALA) and state law (Idaho's abortion restrictions), which is a classic preemption issue.
• Snyder v. United States 26th June 2024
  The decision involves the issue of whether federal law under § 666 should preempt state laws regarding the acceptance of gratuities by state and local officials.
• Cantero v. Bank of America, N. A. 30th May 2024
  The case primarily deals with whether New York's interest-on-escrow law is preempted by federal law, specifically the National Bank Act as interpreted through Dodd-Frank and Barnett Bank.
• Coinbase v. Suski 23rd May 2024
  The case involves determining whether federal arbitration law preempts state law regarding forum selection.
• Great Lakes Ins. SE v. Raiders Retreat Realty Co. 21st February 2024
  The case involves the enforceability of choice-of-law provisions in maritime contracts under federal maritime law, which preempts state law.
• Glacier Northwest, Inc. v. Teamsters 1st June 2023
  The central issue in the case is whether the National Labor Relations Act preempts state tort claims.
• Ohio Adjutant General’s Dept. v. FLRA 18th May 2023
  The case involves federal law overriding state law, as the federal FSLMRS governs labor relations involving the Ohio National Guard.
• Financial Oversight and Management Bd. for P. R. v. Centro De Periodismo Investigativo, Inc. 11th May 2023
  The case involves the interpretation of federal statutory provisions that could preempt state-level claims against the Board.
• Oklahoma v. Castro-Huerta 29th June 2022
  The case primarily addresses whether federal law preempts state jurisdiction in prosecuting crimes committed by non-Indians against Indians in Indian country.
• United States v. Washington 21st June 2022
  The case involves the Supremacy Clause, which is central to the Court's holding that Washington's law is unconstitutional because it discriminates against the Federal Government.
• Marietta Memorial Hospital Employee Health Benefit Plan v. DaVita Inc. 21st June 2022
  The case involves the interpretation of a federal statute, the Medicare Secondary Payer statute, and its application to a private health plan, implicating federal preemption over state or private health plan provisions.
• Viking River Cruises, Inc. v. Moriana 15th June 2022
  The case primarily deals with whether the Federal Arbitration Act preempts California's rule regarding PAGA claims.
• Ysleta del Sur Pueblo v. Texas 15th June 2022
  The case discusses whether federal law under the Restoration Act and IGRA preempts Texas state gaming laws.
• Gallardo v. Marstiller 6th June 2022
  The case involves the interpretation of federal Medicaid Act provisions and whether they allow state laws to seek reimbursement from settlement payments for future medical care.
• Cassirer v. Thyssen-Bornemisza Collection Foundation 21st April 2022
  The decision addresses whether federal common law should displace state law in FSIA cases, implicating preemption principles.
• BP p.l.c. v. Mayor and City Council of Baltimore 17th May 2021
  The case involves the question of whether federal law allows for removal of cases from state to federal court, implicating federal preemption over state jurisdiction.
• Rutledge v. Pharmaceutical Care Management Assn. 10th December 2020
  The central issue in the case is whether Arkansas' Act 900 is pre-empted by ERISA, which is a question of federal law overriding state law.
• McGirt v. Oklahoma 9th July 2020
  The decision addresses whether federal law, specifically the Major Crimes Act, preempts state jurisdiction over crimes committed in Indian country.
• Sharp v. Murphy 9th July 2020
  The decision implies federal law preempts state jurisdiction over crimes committed in Indian country.