A federal judge on Monday called North Dakota’s strict voter-ID law unfair to Native Americans and blocked its use in the coming election, continuing a series of recent victories against restrictions imposed by state legislatures.

In recent days, judges have blocked or loosened voting restrictions in Texas, North Carolina, Wisconsin and Kansas. The fights have pitted Democrats and civil rights groups who say restrictive ID laws discriminate against minorities against Republican legislators, who say they enacted the laws to combat voter fraud and protect the public’s confidence in elections.

[Voting rights activists score important wins in North Carolina and Wisconsin]

U.S. District Judge Daniel L. Hovland said North Dakota for years had provided a safety net for those unable to provide the specific kinds of ID required, and that eliminating it in 2013 would mean eligible voters are disenfranchised.

Before 2013, the state allowed many forms of identification for use at the polls, and those without could sign affidavits to their identity. But the 2013 law allowed only four forms of ID: a North Dakota driver’s license; a North Dakota non-driver’s ID card; a tribal government-issued ID card; or an alternative form of ID prescribed by the secretary of state.

A provision added last year prohibited the secretary of state from allowing college IDs or military IDs to be used.

“Although the majority of voters in North Dakota either possess a qualifying voter ID or can easily obtain one, it is clear that a safety net is needed for those voters who simply cannot obtain a qualifying voter ID with reasonable effort,” Hovland wrote.

“Voter fraud in North Dakota has been virtually non-existent,” wrote Hovland, who was nominated to the bench in 2002 by President George W. Bush. He said the state “produced no evidence suggesting the public’s confidence in the electoral process would be undermined by excusing those voters who cannot reasonably obtain an ID.”

[Appeals court says Texas law discriminates against minorities]

The burdens fall particularly hard on the state’s Native American population, Hovland said.

“The undisputed evidence before the court reveals that Native Americans face substantial and disproportionate burdens in obtaining each form of ID deemed acceptable under the new law,” he wrote.

He added that the law’s challengers “presented undisputed evidence that more than 3,800 Native Americans may likely be denied the right to vote in the upcoming general election in November 2016 absent injunctive relief.”

“Although the majority of voters in North Dakota either possess a qualifying voter ID or can easily obtain one, it is clear that a safety net is needed for those voters who simply cannot obtain a qualifying voter ID with reasonable effort,” Hovland wrote.

The lawsuit was brought by several Native Americans, who presented evidence that the group is less likely to have driver’s licenses, lack birth certificates that are required in some cases to get an ID and are uniquely unable to make use of alternatives such as providing two documents that show their residential addresses.

“One reason is that many Native Americans do not have residential addresses, and the Post Office delivers their mail to a post office box,” the judge wrote.

The decision is among several legal victories for those challenging restrictive voting laws. The full U.S. Court of Appeals for the 5th Circuit ruled that Texas’s law discriminates against minorities and must be amended before the election.

A panel of the U.S. Appeals Court for the 4th Circuit struck North Carolina’s law, saying the Republican-led legislature enacted new voting restrictions in 2013 to intentionally blunt the growing clout of African American voters.

In Wisconsin, two federal judges have attacked separate provisions of that state’s law, and one questioned the legislature’s motives.

“The Wisconsin experience demonstrates that a preoccupation with mostly phantom election fraud leads to real incidents of disenfranchisement,” wrote U.S. District Judge James D. Peterson. “To put it bluntly, Wisconsin’s strict version of voter ID law is a cure worse than the disease.”