Comprehensive guide to Supremacy Clause cases, courts, and legal analysis.
United States v. State of California, decided by Ninth Circuit on April 22, 2026, resulted in a defendant win outcome. The Ninth Circuit affirmed the district court's grant of summary judgment to the ...
Chiles v. Salazar, decided by Supreme Court of the United States on March 31, 2026, resulted in a defendant win outcome. The Supreme Court considered whether a state's "no-retaliation" provision in it...
La Union del Pueblo Entero v. Abbott, decided by Fifth Circuit on February 12, 2026, resulted in a plaintiff win outcome. The Fifth Circuit Court of Appeals considered whether Texas's SB4 immigration ...
Bonilla-Espinoza v. Bondi, decided by Tenth Circuit on January 27, 2026, resulted in a defendant win outcome. The Tenth Circuit affirmed the district court's denial of a preliminary injunction sought ...
This case involves a dispute over whether the state of Washington could prosecute an individual, Lee, for violating a state law that prohibited the possession of certain types of firearms. Lee argued ...
Case v. Montana, decided by Supreme Court of the United States on January 14, 2026, resulted in a plaintiff win outcome. The Supreme Court reviewed a Montana Supreme Court decision that allowed a stat...
State of Oregon v. Trump, decided by Ninth Circuit on October 28, 2025, resulted in a plaintiff win outcome. The Ninth Circuit Court of Appeals affirmed the district court's denial of former President...
Green Room v. State of Wyoming, decided by Tenth Circuit on October 27, 2025, resulted in a defendant win outcome. The Tenth Circuit affirmed the district court's denial of a preliminary injunction so...
Curtis v. Inslee, decided by Ninth Circuit on October 6, 2025, resulted in a defendant win outcome. The Ninth Circuit affirmed the district court's dismissal of a challenge to Washington's "independen...
Coalition for Humane Immigrant Rights v. Kristi Noem, decided by D.C. Circuit on September 12, 2025, resulted in a defendant win outcome. The Coalition for Humane Immigrant Rights (CHIRLA) challenged ...
Benjamin Schoenthal v. Kwame Raoul, decided by Seventh Circuit on September 2, 2025, resulted in a defendant win outcome. The Seventh Circuit affirmed the district court's dismissal of Benjamin Schoen...
La Union del Pueblo Entero v. Abbott, decided by Fifth Circuit on August 29, 2025, resulted in a plaintiff win outcome. The Fifth Circuit Court of Appeals considered whether Texas's SB4 immigration la...
United States v. State of Texas, decided by Fifth Circuit on August 29, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed Texas's challenge to the federal government's authority to...
Coalition for Humane Immigrant Rights v. Kristi Noem, in her official capacity as Secretary of Homeland Security, decided by D.C. Circuit on August 18, 2025, resulted in a plaintiff win outcome. The C...
Hernandez Flores v. Bondi, decided by Second Circuit on August 14, 2025, resulted in a defendant win outcome. The Second Circuit affirmed the district court's denial of a preliminary injunction sought...
Jeffery David King v. The People of the State of Colorado, decided by Colorado Supreme Court on August 4, 2025, resulted in a defendant win outcome. The Colorado Supreme Court considered whether a def...
Refugee and Immigrant Center for Education and Le v. Kristi Noem, decided by D.C. Circuit on August 1, 2025, resulted in a defendant win outcome. The Refugee and Immigrant Center for Education and Leg...
United States Institute of Peace v. Kenneth Jackson, decided by D.C. Circuit on July 24, 2025, resulted in a defendant win outcome. The case concerns whether the United States Institute of Peace (USIP...
CoreCivic Inc v. Governor of New Jersey, decided by Third Circuit on July 22, 2025, resulted in a defendant win outcome. The Third Circuit reviewed a challenge to New Jersey's law prohibiting the stat...
Immigrant Defenders Law Center v. Noem, decided by Ninth Circuit on July 18, 2025, resulted in a plaintiff win outcome. The Ninth Circuit reviewed a district court's decision to grant a preliminary in...
United States v. State of Texas, decided by Fifth Circuit on July 3, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed Texas's challenge to the federal government's authority to en...
United States v. State of Texas, decided by Fifth Circuit on July 3, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed Texas's challenge to the federal government's authority to en...
United States Institute of Peace v. Kenneth Jackson, decided by D.C. Circuit on July 2, 2025, resulted in a defendant win outcome. The case concerns whether the United States Institute of Peace (USIP)...
Free Speech Coalition, Inc. v. Paxton, decided by Supreme Court of the United States on June 27, 2025, resulted in a defendant win outcome. The Supreme Court considered whether a Texas law, the "Save ...
United States Institute of Peace v. Kenneth Jackson, decided by D.C. Circuit on June 27, 2025, resulted in a plaintiff win outcome. The case concerns whether the United States Institute of Peace (USIP...
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