26 ALEXANDER v. SOUTH CAROLINA STATE CONFERENCE OF THE NAACP KAGAN, J., dissenting disputed the charge of racial discrimination. But they could not keep their story straight or make it believable to three judges. The more the officials talked, the more the court became convinced that, to create a red District 1, they had divided citizens by race. And that, again, was even before the statisticians took center stage. B Once the statisticians did so, the Challengers’ case was clinched—at the least, from a clear-error perspective. Consider how much the controverted issue lent itself to statistical evidence. That issue began with a simple fact: The part of Charleston County that the mapmakers excised from District 1 was (vastly) disproportionately Black. The dispute was about what caused that disparity. Statistical evidence showing that it could have arisen from political sorting would significantly benefit the State’s defense. Conversely, statistical evidence showing that the racial disparity could not have arisen in that way would significantly benefit the Challengers’ case. So you might think that the trial would feature a war of statistical experts, each presenting their own multivariate regressions. But you would be wrong. The Challengers did their part, but the State failed to respond in kind. Rather than submit its own statistical studies, the State devoted all its efforts to trying to pick apart the Challengers’. It thus anticipated today’s majority, which (given the unbalanced record) can do nothing more than search for holes, however minute, in the Challengers’ expert evidence. But two separate studies emerge unscathed, and with significant probative force—fully sufficient on clear-error review to justify the District Court’s conclusion. Each analysis was designed to answer the critical question: whether Charleston County was split as it was based on its residents’ race. And each found that it was. Even controlling for political preference, Black voters

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