By declining to take up a lower court ruling, the U.S. Supreme Court has dealt another blow to the Voting Rights Act.

The court announced Monday that it will not review an Arkansas-based lawsuit, leaving in place a 2025 appeals panel ruling that ends a long-used tool for protecting minority voters from discrimination under the landmark law in seven mainly Midwestern states.

That ruling found that in the states covered by the 8th U.S. Circuit Court of Appeals — Arkansas, Iowa, Minnesota, Missouri, Nebraska, North Dakota and South Dakota — private individuals and groups do not have the right to sue to enforce what’s known as Section 208 of the Voting Rights Act, which generally allows voters with a disability or inability to read or write to get help with voting from a person of their choice.

The Supreme Court’s move comes almost two months after its conservative supermajority issued a major ruling that further weakened the Voting Rights Act, setting off a groundswell in redistricting across the country.

In May, shortly after that undermining of Section 2 protections against racial discrimination in redistricting, the high court decided not to weigh in on what the legal world calls a “private right of action,” sending back to lower courts two cases brought by Black voters in Mississippi and Native American voters in North Dakota.

For decades, enforcement of these sections of the Voting Rights Act has mainly been driven by lawsuits by private individuals and groups.

But after conservative Justice Neil Gorsuch issued a single-paragraph opinion in 2021 questioning a private right of action, Republican officials in multiple states have raised a novel legal argument: Only the U.S. attorney general, they contend, has the right to bring lawsuits under these parts of the Voting Rights Act.

Such an interpretation of the law is likely to lead to a dramatic decline in voting rights lawsuits because of the Justice Department’s limited resources and shifting priorities under different presidential administrations.

The case that the justices decided not to take up was brought by the immigrant advocacy group Arkansas United, which has provided Spanish-language interpreters at polling sites to assist voters with limited English proficiency. The group challenged an Arkansas law that bans a person who is not a poll worker from helping more than six voters cast ballots. In 2022, a federal judge ruled that the state law violates Section 208 of the Voting Rights Act. But after GOP state officials appealed, an 8th Circuit panel found last year that private groups, like Arkansas United, do not have the right to bring this kind of lawsuit.