The Supreme Court struck down Louisiana's congressional map — and gutted a 60-year-old voting rights protection in the process.

On April 29, 2026, the Supreme Court decided Louisiana v. Callais, 6–3 along ideological lines. The case centered on Louisiana's congressional map, known as SB 8, which had been drawn after the 2020 census to include two majority-Black districts — giving Black voters, who make up roughly a third of Louisiana's population, meaningful representation in two of its six seats in the U.S. House.

The Court, in a majority opinion written by Justice Samuel Alito and joined by Chief Justice Roberts and Justices Thomas, Gorsuch, Kavanaugh, and Barrett, struck down that map as an unconstitutional racial gerrymander under the Fifteenth Amendment. The core of the ruling: because the Voting Rights Act of 1965 did not require Louisiana to create a second majority-Black district, race could not serve as a justification for drawing district lines that way. Any use of race in mapmaking, the majority held, must be anchored to a compelling governmental interest — and preserving minority representation for its own sake does not clear that bar.

But the ruling went further than Louisiana's map. The majority significantly narrowed Section 2 of the Voting Rights Act, the provision that has long allowed minority voters to challenge redistricting plans that dilute their political power. Under the old standard, plaintiffs could win a Section 2 case by demonstrating discriminatory effect — that a map, whatever the intent behind it, left minority voters with less influence than they should have. Under the new standard established in Callais, plaintiffs must prove discriminatory intent — that lawmakers deliberately drew lines to suppress minority voting power.

That is a distinction with enormous practical consequences. Intent is what lives inside the minds of legislators. It rarely appears in committee transcripts or public statements. Courts have historically found it nearly impossible to prove in redistricting cases, which is precisely why Congress wrote the effects standard into the VRA in 1982 after earlier Supreme Court rulings made intent-based claims too difficult to bring. Callais effectively reverses that legislative correction.

Justice Elena Kagan, writing for the three dissenters, was unsparing: "Today's decision renders Section 2 all but a dead letter." She argued that the majority had not just narrowed the VRA but effectively buried it, dismantling the most consequential tool minority voters have had to challenge maps drawn against them.

The Voting Rights Act of 1965 was signed into law eleven days after Bloody Sunday — the day Alabama state troopers beat civil rights marchers on the Edmund Pettus Bridge in Selma. It was drafted by people who understood that discriminatory intent is almost always deniable. Legislators rarely announce that they are drawing maps to suppress the Black vote. They offer neutral-sounding explanations: compactness, community preservation, incumbency protection. The effects standard was Congress's answer to that problem: stop asking what they meant, and look at what the map does.

Callais is the latest in a series of rulings that have progressively dismantled that framework. In Shelby County v. Holder (2013), the Court gutted the VRA's preclearance requirement, which had forced states with a history of discrimination to get federal approval before changing voting laws. In Brnovich v. Democratic National Committee (2021), the Court narrowed Section 2's application to voting laws beyond redistricting. Now, Callais completes the circuit: the provision that survived Shelby and Brnovich has been hollowed out from the inside.

The timing sharpens the stakes considerably. The 2026 midterm elections are months away. Louisiana has already announced it will delay its May 16 congressional primaries to allow the state legislature to redraw its map. Governors in Alabama and Tennessee called their legislatures into special session within days of the ruling. A CBS News analysis estimates that if Republican-controlled legislatures in the South move aggressively, they could add between one and nine GOP-friendly House seats for 2026 — with a potential ceiling of twelve additional seats based on longer-term redistricting across the region. Republicans currently hold a slim House majority.

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  What Louisiana's new map looks like

  The state legislature must now draw a replacement congressional map without using race as a primary factor. Watch whether the new map preserves anything close to meaningful Black representation, or whether it effectively collapses two competitive districts into one safe Republican seat. The map that emerges will be the first stress-test of what the post-Callais redistricting landscape actually allows.

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  The redistricting domino effect across the South

  Alabama and Tennessee have already called special legislative sessions. Georgia, Mississippi, and Texas are being watched for similar moves. Each state presents a different legal and political landscape, and not all redistricting attempts will survive lower-court challenges — but Callais has given Republican-controlled legislatures a significant opening. The pace of those dominoes matters enormously for which maps are actually in place before November.

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  The future of the Voting Rights Act itself

  Justice Kagan's dissent argues that Callais has rendered Section 2 effectively unenforceable. Whether Congress can — or will — respond by rewriting the statute to restore the effects standard is the longer-term question. In the current political environment, that is extraordinarily unlikely. Which means the VRA, for practical purposes, now does much less than its name suggests.