Native American tribes in North Dakota challenged a state legislative map they said dilutes their voting power. An appeals court said they can't sue.

This would eliminate the most common path people and civil rights groups use to sue under a key provision of the 60-year-old Voting Rights Act.

Supreme Court Justices Clarence Thomas, Samuel Alito and Neil Gorsuch dissented Thursday from the court’s decision to halt an outlier federal appeals court ruling that would have further limited the Voting Rights Act.