Cite as: 588 U. S. ____ (2019) 23 Opinion of the Court intent” inquiry to determine whether race was, in fact, the reason particular district boundaries were drawn the way they were. If district lines were drawn for the purpose of separating racial groups, then they are subject to strict scrutiny because “race-based decisionmaking is inherently suspect.” Miller, 515 U. S., at 915. See Bush, 517 U. S., at 959 (principal opinion). But determining that lines were drawn on the basis of partisanship does not indicate that the districting was improper. A permissible intent— securing partisan advantage—does not become constitutionally impermissible, like racial discrimination, when that permissible intent “predominates.” The District Court tried to limit the reach of its test by requiring plaintiffs to show, in addition to predominant partisan intent, that vote dilution “is likely to persist” to such a degree that the elected representative will feel free to ignore the concerns of the supporters of the minority party. 318 F. Supp. 3d, at 867. But “[t]o allow district courts to strike down apportionment plans on the basis of their prognostications as to the outcome of future elections . . . invites ‘findings’ on matters as to which neither judges nor anyone else can have any confidence.” Bandemer, 478 U. S., at 160 (opinion of O’Connor, J.). See LULAC, 548 U. S., at 420 (opinion of Kennedy, J.) (“[W]e are wary of adopting a constitutional standard that invalidates a map based on unfair results that would occur in a hypothetical state of affairs.”). And the test adopted by the Common Cause court requires a far more nuanced prediction than simply who would prevail in future political contests. Judges must forecast with unspecified certainty whether a prospective winner will have a margin of victory sufficient to permit him to ignore the supporters of his defeated opponent (whoever that may turn out to be). Judges not only have to pick the winner—they have to beat the point spread. The appellees assure us that “the persistence of a