In Rucho v. Common Cause (2019), the U.S. Supreme Court ruled that federal courts have no authority to review partisan-gerrymandering cases.
Notes on verification
Confirmed by Wikipedia, SCOTUSblog, and Congressional Research Service summaries, all consistent on the 5-4 ruling and its holding that partisan gerrymandering claims are nonjusticiable political questions.
Sources
- What's at Stake When the Supreme Court Argues Moore v. ... (propublica.org)
- https://www.scotusblog.com/cases/rucho-v-common-cause-2/ (scotusblog.com)
- https://www.congress.gov/crs_external_products/LSB/HTML/LSB10324.web.html (congress.gov)