Republican Attorney General Mark Brnovich has asked the Supreme Court to keep in place an Arizona law that prohibits voters from delivering other people’s mail ballots to the polls.

Political organizations and Native American tribes would previously collect mail-in ballots and drop them off at precincts before or on election day, but state lawmakers banned the practice in 2016, groups said.

Brnovich’s request comes less than a week after the 9th Circuit Court of Appeals ruled that the policy is illegal and violates the Voting Rights Act, officials said.

Some Democrats have argued the policy disproportionately affected Native American, Hispanic, African American and other voters in Arizona who have poor mail service.

Some Republican legislators have argued that the practice of ballot harvesting leaves elections vulnerable to fraud.