Cite as: 570 U. S. ____ (2013) 3 Syllabus cial discrimination in voting” that had “infected the electoral process in parts of our country for nearly a century,” Katzenbach, 383 U. S., at 308. At the time, the coverage formula—the means of linking the exercise of the unprecedented authority with the problem that warranted it—made sense. The Act was limited to areas where Congress found “evidence of actual voting discrimination,” and the covered jurisdictions shared two characteristics: “the use of tests and devices for voter registration, and a voting rate in the 1964 presidential election at least 12 points below the national average.” Id., at 330. The Court explained that “[t]ests and devices are relevant to voting discrimination because of their long history as a tool for perpetrating the evil; a low voting rate is pertinent for the obvious reason that widespread disenfranchisement must inevitably affect the number of actual voters.” Ibid. The Court therefore concluded that “the coverage formula [was] rational in both practice and theory.” Ibid. Pp. 12–13. (3) Nearly 50 years later, things have changed dramatically. Largely because of the Voting Rights Act, “[v]oter turnout and registration rates” in covered jurisdictions “now approach parity. Blatantly discriminatory evasions of federal decrees are rare. And minority candidates hold office at unprecedented levels.” Northwest Austin, supra, at 202. The tests and devices that blocked ballot access have been forbidden nationwide for over 40 years. Yet the Act has not eased §5’s restrictions or narrowed the scope of §4’s coverage formula along the way. Instead those extraordinary and unprecedented features have been reauthorized as if nothing has changed, and they have grown even stronger. Because §5 applies only to those jurisdictions singled out by §4, the Court turns to consider that provision. Pp. 13–17. (b) Section 4’s formula is unconstitutional in light of current conditions. Pp. 17–25. (1) In 1966, the coverage formula was “rational in both practice and theory.” Katzenbach, supra, at 330. It looked to cause (discriminatory tests) and effect (low voter registration and turnout), and tailored the remedy (preclearance) to those jurisdictions exhibiting both. By 2009, however, the “coverage formula raise[d] serious constitutional questions.” Northwest Austin, supra, at 204. Coverage today is based on decades-old data and eradicated practices. The formula captures States by reference to literacy tests and low voter registration and turnout in the 1960s and early 1970s. But such tests have been banned for over 40 years. And voter registration and turnout numbers in covered States have risen dramatically. In 1965, the States could be divided into those with a recent history of voting tests and low voter registration and turnout and those without those char-