Browse 5 major questions doctrine cases decided by Fifth Circuit. AI-powered summaries, holdings, and legal analysis.
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...
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...
CaseLawBrief currently tracks 5 major questions doctrine cases from Fifth Circuit. This number is updated as new opinions are published.
Outcome breakdown: Mixed: 1, Defendant Win: 4.
Each case page on CaseLawBrief includes an AI-generated plain English summary, key holdings, and legal analysis. Click any case above to read its full analysis.