Cite as: 588 U. S. ____ (2019) 17 Opinion of the Court 43–51 (2013). That meant that a party could garner nearly half of the vote statewide and wind up without any seats in the congressional delegation. The Whigs in Alabama suffered that fate in 1840: “their party garnered 43 percent of the statewide vote, yet did not receive a single seat.” Id., at 48. When Congress required single-member districts in the Apportionment Act of 1842, it was not out of a general sense of fairness, but instead a (mis)calculation by the Whigs that such a change would improve their electoral prospects. Id., at 43–44. Unable to claim that the Constitution requires proportional representation outright, plaintiffs inevitably ask the courts to make their own political judgment about how much representation particular political parties deserve— based on the votes of their supporters—and to rearrange the challenged districts to achieve that end. But federal courts are not equipped to apportion political power as a matter of fairness, nor is there any basis for concluding that they were authorized to do so. As Justice Scalia put it for the plurality in Vieth: “ ‘Fairness’ does not seem to us a judicially manageable standard. . . . Some criterion more solid and more demonstrably met than that seems to us necessary to enable the state legislatures to discern the limits of their districting discretion, to meaningfully constrain the discretion of the courts, and to win public acceptance for the courts’ intrusion into a process that is the very foundation of democratic decisionmaking.” 541 U. S., at 291. The initial difficulty in settling on a “clear, manageable and politically neutral” test for fairness is that it is not even clear what fairness looks like in this context. There is a large measure of “unfairness” in any winner-take-all system. Fairness may mean a greater number of competitive districts. Such a claim seeks to undo packing and