The 6-3 majority dismissed the “independent state legislature” theory, which would have given state lawmakers nearly unchecked power over federal elections.
The vote was 5 to 4, with the majority finding that an 1868 treaty did not require the federal government to ensure the tribe had access to water.
In soaring opinions steeped in history, Justice Gorsuch has demonstrated a distinctive dedication to Native American rights.
The Supreme Court will soon consider whether to hear an appeal of a ruling striking down a domestic-violence law under the Second Amendment.
Voting rights advocates had feared the decision would undermine the Voting Rights Act, which instead appeared to emerge unscathed.
In earlier cases, the justices struck down provisions of the trademark law that discriminated based on the speaker’s viewpoint.
The justices will soon rule on race-conscious admissions plans at Harvard and U.N.C. A new appeals court case asks whether schools can use race-neutral tools to achieve racial diversity.
The justices struck down a New York gun control law last year, announcing a new test to evaluate the constitutionality of such measures.
The justices will decide whether individual House Democrats have standing to sue for documents concerning possible conflicts of interest.
A unanimous three-judge panel found that a congressional voting district anchored in Charleston, S.C., violated the Constitution’s equal protection clause.