MADISON, Wis. (AP) -- The Wisconsin Justice Department's second-in-command is arguing before the state Supreme Court that a Madison judge exceeded her authority when she struck down Republican Gov. Scott Walker's contentious law limiting public employees' union rights.

Democrat Ismael Ozanne, the Dane County district attorney, filed a lawsuit in March claiming Republican legislators held a committee meeting on the measure without giving proper public notice. Judge Maryann Sumi first blocked the law from taking effect while she considered the case and then last month declared it void.

The oral arguments the Supreme Court heard Monday were on the Department of Justice's request for it to take the case. Deputy Attorney General Kevin St. John says Sumi improperly interrupted the legislative process.

Ozanne is expected to make his arguments later Monday.