Arizona State Legislature v. Arizona Independent Redistricting Commission

Decided June 29, 2015. Ruth Bader Ginsburg delivered the opinion of the Court.

Docket 13-1314 · 576 U.S. 787 (2015) · Cited 174 times

Holding

EPA interpreted § 7412(n)(1)(A) unreasonably when it deemed cost irrelevant to the decision to regulate power plants.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court — read the official opinion for authority.

How the Justices voted

Decided 5–4.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• Hawke v. Smith (No. 1) · 253 U.S. 221 (1920)
• Raines v. Byrd · 521 U.S. 811 (1997)
• Smiley v. Holm · 285 U.S. 355 (1932)
• Coleman v. Miller · 307 U.S. 433 (1939)
• Branch v. Smith · 538 U.S. 254 (2003)
• Massachusetts v. Mellon · 262 U.S. 447 (1923)
• U. S. Term Limits, Inc. v. Thornton · 514 U.S. 779 (1995)
• Vieth v. Jubelirer · 541 U.S. 267 (2004)
• Immigration & Naturalization Service v. Chadha · 462 U.S. 919 (1983)
• Lujan v. Defenders of Wildlife · 504 U.S. 555 (1992)
• Gregory v. Ashcroft · 501 U.S. 452 (1991)
• Atlantic Cleaners & Dyers, Inc. v. United States · 286 U.S. 427 (1932)
• Powell v. McCormack · 395 U.S. 486 (1969)
• Arizona v. Inter Tribal Council of Ariz., Inc. · 570 U.S. 1 (2013)
• Romer v. Evans · 517 U.S. 620 (1996)
• Clinton v. City of New York · 524 U.S. 417 (1998)
• McPherson v. Blacker · 146 U.S. 1 (1892)
• Warth v. Seldin · 422 U.S. 490 (1975)
• Baker v. Carr · 369 U.S. 186 (1962)
• Allen v. Wright · 468 U.S. 737 (1984)
• Valley Forge Christian College v. Americans United for Separation of Church and State, Inc. · 454 U.S. 464 (1982)
• United States v. Lopez · 514 U.S. 549 (1995)
• West Virginia State Board of Education v. Barnette · 319 U.S. 624 (1943)
• Arizonans for Official English v. Arizona · 520 U.S. 43 (1997)
• Stern v. Marshall · 564 U.S. 462 (2011)
• Alden v. Maine · 527 U.S. 706 (1999)
• Crowell v. Benson · 285 U.S. 22 (1932)
• Whitman v. American Trucking Assns., Inc. · 531 U.S. 457 (2001)
• New York v. United States · 505 U.S. 144 (1992)
• United States v. Detroit Timber & Lumber Co. · 200 U.S. 321 (1906)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Rucho v. Common Cause · 588 U.S. 684 (2019)
• Virginia House of Delegates v. Bethune-Hill · 587 U.S. 658 (2019)
• Gamble v. United States · 587 U.S. 678 (2019)
• Gobeille v. Liberty Mut. Ins. Co. · 577 U.S. 312 (2016)
• Chiafalo v. Washington · 591 U.S. 578 (2020)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

Explore from here

Ruth Bader Ginsburg’s profile · All Supreme Court opinions · The Supreme Court

Source: Supreme Court of the United States, slip opinions (2015). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).