The Supreme Court had already ruled that North Carolina's voter restrictions violated the U.S. Constitution. But North Carolina appealed for reconsideration and reinstatement of the law, at least for the November election to avoid confusion.
The Court said No . . . again. Just get over it, folks.
But look how close it was. Justices Ginsburg, Breyer, Sotomayor, and Kagan voted No. Thus it was a 4 to 4 tie, meaning that if Justice Scalia were still there, North Carolina's election laws that discriminated against African-Americans would have been reinstated.
Or if Donald Trump is elected president in November and gets to name the ninth justice, which remains a possibility.