U.S. Supreme Court Sharply Limits Use of Race in Congressional Redistricting, Weakening Voting Rights Act
Why It Matters
A landmark U.S. Supreme Court ruling issued Wednesday is poised to reshape how congressional and state legislative districts are drawn across the country for decades to come. The decision in Louisiana v. Callais significantly curtails how race may be used when redrawing electoral maps, delivering what conservatives called a long-overdue correction to a redistricting process they say had been manipulated for political ends.
The ruling weakens a key provision of the federal Voting Rights Act and is already prompting Republican-led states across the South to move quickly toward redrawing their congressional maps — a process that could reshape the balance of power in the U.S. House of Representatives.
What Happened
The Supreme Court’s conservative majority ruled 6-3 in Louisiana v. Callais that Louisiana’s congressional map, which included a second majority-Black district created in 2024, constitutes an unconstitutional racial gerrymander. The court found the state was not required to create that district under Section 2 of the Voting Rights Act.
Writing for the majority, Justice Samuel Alito concluded that the historical evidence presented did not demonstrate that the challenged map resulted from intentional racial discrimination. Justice Elena Kagan dissented, arguing the court has been systematically dismantling the Voting Rights Act for more than a decade and that the ruling now permits states to dilute minority voting power without legal consequence.
The ruling arrives amid a broader wave of mid-decade redistricting. Seven states — including Texas, Missouri, North Carolina, Ohio, Utah, and Virginia — had already begun redrawing their maps this year at the urging of President Donald Trump, who called on Republicans to maximize partisan advantage ahead of November’s midterm elections. Florida lawmakers are expected to approve a new map imminently.
By the Numbers
- 6-3: The Supreme Court’s vote in Louisiana v. Callais, splitting along ideological lines.
- Up to 19: Additional U.S. House seats Republicans could potentially gain nationally as a result of the ruling, according to a projection by progressive advocacy groups Fair Fight Action and the Black Voters Matter Fund.
- Up to 200: State legislative seats across the South that the same groups projected Republicans could gain at the state level.
- 122 vs. 26: As of 2024, majority-minority U.S. House districts held by Democrats versus Republicans, according to Ballotpedia estimates.
- 7 states: The number of states that had already redrawn their congressional maps this year prior to Wednesday’s ruling.
Zoom Out
Wednesday’s ruling is the latest in a series of Supreme Court decisions that have progressively scaled back the reach of the Voting Rights Act of 1965. In 2013, the court effectively ended federal preclearance requirements — which had forced certain states with histories of voting discrimination to obtain federal approval before changing election rules. In 2019, the court ruled that federal courts cannot review claims of partisan gerrymandering, opening the door to the wave of politically motivated redistricting that followed the 2020 census.
The Callais decision is likely to accelerate that trend significantly. The Supreme Court has also faced scrutiny in recent months over the scope of government surveillance powers, reflecting a broader pattern of major constitutional questions working their way through the federal judiciary.
Republicans praised the ruling as a reaffirmation that election maps should not be engineered through racial formulas. Rep. Richard Hudson, a North Carolina Republican who chairs the National Republican Congressional Committee, said in a statement that “the Supreme Court made clear that our elections should be decided by voters, not engineered through unconstitutional mandates.”
Mississippi Gov. Tate Reeves announced a special legislative session to redraw his state’s Supreme Court districts, set to begin 21 days after the ruling’s release. U.S. Sen. Marsha Blackburn of Tennessee, currently running for governor, called on her state’s legislature to reconvene and redraw congressional maps to create an additional Republican-held seat in the Memphis area, saying the move is essential to advancing President Trump’s agenda.
What’s Next
Because primary elections have already been held in several southern states and ballots distributed in others, the most immediate impact of the ruling is likely to be felt in the 2028 election cycle rather than in November. Louisiana itself, the state at the center of the case, may not implement a new map until next year given the May 16 primary deadline.
Democrats in Congress are renewing calls to pass the John R. Lewis Voting Rights Advancement Act, which aims to strengthen Section 2 of the Voting Rights Act. The legislation passed the Democratic-controlled House in 2021 but was blocked in the Senate. Whether the bill would survive constitutional scrutiny under the Callais framework remains an open question. Federal courts are simultaneously weighing other significant civil rights questions, underscoring the expansive role the judiciary continues to play in shaping policy nationwide.
Voting rights advocates say they will increasingly focus on state-level legislative protections as the federal landscape narrows. The redistricting battles set in motion by Wednesday’s ruling are widely expected to define political maps — and congressional majorities — well into the next decade.
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