Explore 8 court opinions on Major Questions Doctrine. AI-powered plain English summaries, key holdings, and legal analysis.
8 recent cases analyzed in this topic area.
Eleventh Circuit Affirms EPA's CWA Authority, Rejects Major Questions Doctrine
Friends of the Everglades, Inc. v. Secretary of the U.S. Department of Homeland Security, decided by Eleventh Circuit on April 21, 2026, resulted in a defendant win outcome. The Eleventh Circuit affir...
Fifth Circuit Vacates EPA's Approval of Texas's Clean Air Act Plan
State of Texas v. EPA, decided by Fifth Circuit on March 13, 2026, resulted in a mixed outcome. The Fifth Circuit reviewed the EPA's "Good Neighbor" provision under the Clean Air Act, which requires s...
Fifth Circuit Vacates EPA Rule for Exceeding Statutory Authority
State of Texas v. EPA, decided by Fifth Circuit on September 22, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed the EPA's authority to regulate greenhouse gas emissions under th...
Eleventh Circuit Upholds EPA's Authority to Regulate Greenhouse Gases
Donald Johnson v. United States Congress, decided by Eleventh Circuit on August 19, 2025, resulted in a plaintiff win outcome. The Eleventh Circuit addressed whether the "major questions doctrine" app...
SCOTUS Blocks OSHA Vaccine-or-Test Mandate for Large Employers
Trump v. CASA, Inc., decided by Supreme Court of the United States on June 27, 2025, resulted in a defendant win outcome. The Supreme Court considered whether the Biden administration's "interim final...
Fifth Circuit Vacates EPA's Clean Power Plan for Exceeding Statutory Authority
Deep South v. EPA, decided by Fifth Circuit on May 21, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed the EPA's authority to regulate greenhouse gas emissions from power plants ...
Fifth Circuit Vacates EPA Rule for Exceeding Statutory Authority
State of Texas v. EPA, decided by Fifth Circuit on May 16, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed the EPA's authority to regulate greenhouse gas emissions under the Clea...
Fifth Circuit Vacates EPA Rule for Exceeding Statutory Authority
State of Texas v. EPA, decided by Fifth Circuit on March 25, 2025, resulted in a defendant win outcome. The Fifth Circuit reviewed the EPA's authority to regulate greenhouse gas emissions under the Cl...