Cite as: 602 U. S. ____ (2024) 29 Opinion of the Court Duchin’s conclusion was based on an assessment of the map as a whole rather than District 1 in particular. A state-wide analysis cannot show that District 1 was drawn based on race. See Bethune-Hill, 580 U. S., at 191 (“[T]he basic unit of analysis for racial gerrymandering claims . . . is the district”); Alabama Legislative Black Caucus, 575 U. S., at 262–263 (a racial-gerrymandering claim “does not apply to a State considered as an undifferentiated ‘whole’ ”). Given these serious problems, it is no wonder that the challengers cite Dr. Duchin’s report only in support of their racial votedilution claim. It has no probative force with respect to their racial-gerrymandering claim regarding District 1’s boundaries. To sum up our analysis so far, no direct evidence supports the District Court’s finding that race predominated in the design of District 1 in the Enacted Plan. The circumstantial evidence falls far short of showing that race, not partisan preferences, drove the districting process, and none of the expert reports offered by the Challengers provides any significant support for their position. 11 —————— 11 The dissent, by contrast, would make it virtually impossible to show clear error in a case like this. The dissent agrees that a plaintiff raising a racial-gerrymandering claim bears a “demanding burden.” Post, at 10 (opinion of KAGAN, J.). But according to the dissent’s view, clear-error review means that this burden vanishes on appeal because a plaintiff ’s “hardest job should be done” once it prevails before a three-judge district court. Ibid. That misses the point. In assessing whether a finding is clearly erroneous, it is important to keep in mind the standard of proof that the district court was required to apply. It is hornbook law, after all, that we must ask on appeal whether the “factfinder in the first instance made a mistake in concluding that a fact had been proven under the applicable standard of proof.” Concrete Pipe & Products of Cal., Inc. v. Construction Laborers Pension Trust for Southern Cal., 508 U. S. 602, 622–623 (1993) (emphasis added); see also H. Edwards & L. Elliott, Federal Standards of Review 26 (3d ed. 2018) (“[I]n applying the clearly erroneous standard, a reviewing court must take account of the standard of proof informing the trial court’s factual finding”). Once our task is framed properly, we can easily conclude for the reasons that follow that

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