The U.S. Supreme Court declined Monday to hear North Carolina’s appeal of a court ruling that found its legislature intended to discriminate against minorities in enacting one of the toughest voter ID laws in the nation.

The action leaves in place a federal appellate court ruling which previously struck down portions of the law and blocked enforcement.

As is the court’s usual custom, no explanation was given for turning down the appeal, and no vote was noted. Chief Justice John Roberts said the state had produced a “blizzard of filings” over who was authorized to appeal. He noted that although the court declined to hear the case, the refusal expresses no opinion about the merits of the issue.