Cite as: 602 U. S. ____ (2024) 5 Opinion of the Court therefore raises “special challenges” for plaintiffs. Cooper, 581 U. S., at 308. To prevail, a plaintiff must “disentangle race from politics” by proving “that the former drove a district’s lines.” Ibid. (emphasis added). That means, among other things, ruling out the competing explanation that political considerations dominated the legislature’s redistricting efforts. If either politics or race could explain a district’s contours, the plaintiff has not cleared its bar. Our decision in Easley v. Cromartie, 532 U. S. 234 (2001) (Cromartie II ), illustrates the difficulties that plaintiffs must overcome in this context. There, the plaintiffs’ case hinged on circumstantial evidence of a racial gerrymander such as expert testimony and discrepancies between the relevant district lines and traditional districting criteria. Id., at 240–241; see also Cooper, 581 U. S., at 321 (describing the direct evidence in Cromartie II as “extremely weak”). After the State asserted a partisan-gerrymandering defense, we faulted the plaintiffs for failing to show “that the legislature could have achieved its legitimate political objectives in alternative ways that are comparably consistent with traditional districting principles.” Cromartie II, 532 U. S., at 258. In other words, the plaintiffs failed to meet the high bar for a racial-gerrymandering claim by failing to produce, among other things, an alternative map showing that a rational legislature sincerely driven by its professed partisan goals would have drawn a different map with greater racial balance. Since our decision in Cromartie II, any plaintiff with a strong case has had every incentive to produce such an alternative map. Without an alternative map, it is difficult for plaintiffs to defeat our starting presumption that the legislature acted in good faith. This presumption of legislative good faith directs district courts to draw the inference that cuts in the legislature’s favor when confronted with evidence that could plausibly support multiple conclusions. See, e.g., Abbott v. Perez, 585 U. S. 579, 610–612 (2018). This approach

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