16 ALEXANDER v. SOUTH CAROLINA STATE CONFERENCE OF THE NAACP KAGAN, J., dissenting And here is the rub—the thing that created this case. The part of the county that the legislature moved out of District 1 was disproportionately Black, and by a lot. The mapmakers targeted several heavily Black neighborhoods in North Charleston, while leaving many heavily White neighborhoods alone. See id., at 261a–262a. And no matter how you slice the numbers, the effects were stark. More than 60% of Black Charleston County residents previously in District 1 were relocated to District 6. 649 F. Supp. 3d 177, 189 (SC 2023). Of the 11 precincts with the largest Black populations, 10 were gone. Ibid. Overall, the proportion of African Americans in the excised part of the county (23.8%) was more than twice as high as in the remaining part (10.3%). See id., at 190; Supp. App. 153a. The upshot was that 79% of Charleston County’s Black population now found itself in District 6, whereas only 53% had been there before. See 649 F. Supp. 3d, at 190, and n. 9. As the State’s main mapmaker—and star witness—acknowledged, the new lines created a “tremendous [racial] disparity” in comparison to the old districting plan. J. S. A. 262a; 649 F. Supp. 3d, at 189. The question at trial was how that disparity had come about. By that time, the State had adopted its politics-only defense. It argued, as the majority says, that the point of redrawing District 1 was to “enhance[ ] the Republican advantage” there—i.e., to make sure a Democratic candidate could not win. Ante, at 9. But that claim, even if true, would not be enough for the State to prevail. As this Court has held, a State cannot divide voters by race to achieve political ends. See Miller, 515 U. S., at 914. “[T]he sorting of voters on the grounds of their race” is a constitutional problem “even if race is meant to function as a proxy” for political affiliation. Cooper, 581 U. S., at 309, n. 7; see id., at 291, and n. 1. So the critical issue was not whether the State’s ultimate aim was political or racial (though the majority often phrases it that way, see, e.g., ante, at 1, 5, 17). Instead,

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