In a landmark decision Tuesday, a deeply divided U.S. Supreme court overturned a key portion of the Voting Rights Act. In a 5-4 decision, the court struck down Section 4. That is the portion of the law that determines what parts of the country must have their voting laws precleared by the federal government.

Under the 1965 statute, nine states, including Texas, are required to get federal approval before making any changes to their voting laws. The law also applies to parts of seven other states, all of which have a history of infringing on minority voting rights. The statute was reauthorized in 2006.

The justices ruled that the government cannot enforce precelearance until Congress reevaluates voting data and updates its coverage formula. The court did not rule on the constitutionality of Section 5, itself.

“Our country has changed, and while any racial discrimination in voting is too much, Congress must ensure that the legislation it passes to remedy that problem speaks to current conditions,” Chief Justice John Roberts wrote.

Several Texas laws hinge on the constitutionality of the Voting Rights Act. The state’s voter ID legislation and its redistricting maps are stalled in federal court, after the government denied approval to the voting law changes.

Attorney General Greg Abbott weighed in on Twitter almost immediately, saying:

Supreme Court Justice Ruth Bader Ginsburg made the rare move of reading the dissenting opinion from the bench. Ginsburg said, “The sad irony of today’s decision lies in its utter failure to grasp why the VRA has proven effective. The Court appears to believe that the VRA’s success in eliminating the specific devices extant in 1965 means that preclear­ance is no longer needed.”