A federal court has not yet ruled that Fayette County, TN, violated Section 2 of the Voting Rights Act; rather, the U.S. Department of Justice filed a lawsuit alleging such a violation.
A federal court ruled that Fayette County, TN, violated Section 2 of the Voting Rights Act.

FactVerify
Source: factverify.com
What the Evidence Shows
The claim states that a federal court ruled Fayette County, Tennessee, violated Section 2 of the Voting Rights Act. However, the search results indicate that as of January 2025, the U.S. Department of Justice filed a lawsuit against Fayette County alleging that the county's 2021 redistricting plan violated Section 2 by diluting Black voters' voting power. Multiple sources confirm the filing of this complaint and lawsuit but do not report any court ruling or judgment on the matter.
The case appears to be in its early stages, with allegations made by the DOJ but no final judicial decision rendered yet. Therefore, while there is an official legal challenge claiming a violation, there is no evidence from the provided sources that a federal court has ruled in favor of this claim at this time.