The Democratic National Committee and voters sued the state over the law the same year it passed, claiming the ban violates Section 2 of the Voting Rights Act by discriminating against the state’s Native American, Hispanic and African American citizens who rely more on third-party collection. They also argued it violates the 15th Amendment to the U.S. Constitution, which guarantees that race not be a barrier to voting.
At the time of the bill’s passing, Arizona Gov. Doug Ducey said it would help maintain election integrity.
The case is now before the U.S. Supreme Court, which heard oral arguments March 2.