Missouri voted to raise the minimum wage and require paid sick leave, but now that could be overturned by the Missouri Supreme Court.

Missouri voters approved Proposition A by a martin of 15% and more than 445,000 votes. But business groups argue that the ballot measure violates state law.

Does Proposition A violate the Missouri Constitution? That’s what the State Supreme Court is now weighing. The voter-passed initiative will raise Missouri’s minimum wage to $15 an hour next year and requires employers to provide one hour of paid sick leave for every 30 hours worked.