Cite as: 602 U. S. ____ (2024) 7 THOMAS, J., concurring in part those principles and with common gerrymandering techniques. A legislature seeking to gerrymander a district will often proceed by “packing” or “cracking” groups of minority voters. “Packing” means concentrating minority voters in a single district to reduce their influence in surrounding districts. “Cracking” means splitting a group of minority voters between multiple districts to avoid strong minority influence in any one district. But, in areas where “political groups . . . tend to cluster (as is the case with Democratic voters in cities),” apparent packing or cracking can simply reflect “adherence to compactness and respect for political subdivision lines” or “the traditional criterion of incumbency protection.” Id., at 290, 298. This case exemplifies the problem—the majority observes that Dr. Moon Duchin’s report failed to “account for” the traditional districting principles of “partisanship or core retention” in “assessing whether the Enacted Plan ‘cracks’ black voters among multiple districts.” Ante, at 28–29. The difference between illegitimate packing and the legitimate pursuit of compactness is too often in the eye of the beholder. Perhaps the most serious obstacle to evaluating whether a map is consistent with traditional districting principles is the fact that race and politics are, at present, highly correlated in American society. Racial gerrymandering is constitutionally suspect, but “a jurisdiction may engage in constitutional political gerrymandering.” Rucho, 588 U. S., at 701 (internal quotation marks omitted). So, even if a court is able to navigate all the complications I have identified so far, it must still contend with the reality that “political and racial reasons are capable of yielding similar oddities in a district’s boundaries.” Cooper v. Harris, 581 U. S. 285, 308 (2017). To that end, “when the State asserts partisanship as a defense,” plaintiffs must meet the “formidable task” of “disentangl[ing] race from politics and prov[ing] that the former drove a district’s lines.” Ibid. Courts are not well

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