According to Oak Grove's petition, it terminated a contract with Anoka County for the tablets, but the county said it must still use the electronic voter rosters. If the court sides with Oak Grove, it would set a precedent allowing other Minnesota cities to follow suit. The Upper Midwest Law Center, a conservative legal group, is representing Oak Grove without cost and argues state law leaves the decision up to the city. The Secretary of State's Office said the electronic voter rosters are secure and more efficient than using paper. Groundwork Legal, a nonprofit legal organization, filed a brief in court on behalf of the League of Women Voters warning that the Supreme Court siding with Oak Grove would have substantial consequences.