The Supreme Court will hear a second round of oral arguments on Wednesday in a Louisiana redistricting case over race-based congressional districting laws, which could lead to as many as 10 southern states redrawing their maps.

With Louisiana v. Callais , the high court is evaluating whether Louisiana’s creation of “a second majority-minority congressional district violates the Fourteenth or Fifteenth amendments to the U.S. Constitution.” The justices’ decision is expected to have widespread implications for redistricting, potentially tossing out the parameters for race-based legal challenges of congressional maps under Section 2 of the Voting Rights Act established by the Supreme Court’s 1986 ruling in Thornburg v. Gingles , which has played a significant role in redistricting

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