ST. PAUL, Minn. (AP) — Minnesota State Auditor Rebecca Otto says she’ll appeal her case over a state law allowing counties to hire private firms for financial audits to the Minnesota Supreme Court.

Minnesota’s Court of Appeals on Tuesday upheld the controversial 2015 law in a 2-1 ruling. It’s the second such decision, following a district court’s ruling last year that the change was constitutional.

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Republicans behind the change argued counties can get cheaper audits through private firms. But Otto says it’s an unconstitutional breech of her duties.

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Otto said Tuesday she plans to take the case to the state’s highest court. She has spent more than $250,000 fighting the law so far.

Republican Rep. Sarah Anderson said an appeal to the Supreme Court “would serve no purpose other than to waste taxpayer dollars.”

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