A federal judge struck down Wisconsin's voter identification law Tuesday, saying the measure places an unnecessary burden on poor and minority voters, court documents showed.
The ruling comes amid Supreme Court decisions that question the relevance of civil rights laws put in place during the 1960s to combat discriminatory state statutes on voting.
U.S. District Judge Lynn Adelman wrote in the ruling that the law could have a disproportionate impact on such voters because of the costs some of them might incur in obtaining a photo ID, if they did not already have one, according to online court documents.
The ruling could set a precedent for similar legal challenges in Texas, North Carolina and elsewhere. There are 31 states with laws in effect requiring voters to show some form of identification, according to the National Conference of State Legislatures. Seven states have strict photo ID requirements similar to the one a state judge struck down in Arkansas last week; that decision has been appealed to the Arkansas Supreme Court. Pennsylvania's voter ID law has been put on hold because of court challenges.