Louisiana v. Callais · ¶91

To satisfy the second and third preconditions—politically cohesive voting by the minority and racial-bloc voting by the majority—the plaintiffs must provide an analysis that controls for party affliation. In other words, they must show that voters engage in racial bloc voting that cannot be explained by partisan affliation. This is, once again, critical for “disentangl[ing] race and politics.” Alexander, 602 U. S., at 6.

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