MADISON, Wis. — A Wisconsin judge issued a temporary restraining order today blocking the state’s new and contentious collective bargaining law from taking effect.

Dane County Judge Maryann Sumi issued the order to temporarily block the law as District Attorney Ismael Ozanne, a Democrat, had requested.

Ozanne filed a lawsuit contending that a legislative committee that broke a stalemate that had kept the law in limbo for weeks met without the 24-hour notice required by Wisconsin’s open meetings law. The Republican-controlled Legislature passed the measure and Gov. Scott Walker signed it last week.

A spokesman for Republican Senate Majority Leader Scott Fitzgerald declined to comment, citing the legal fight.

Messages left for comment with Walker’s spokesmen, as well as Democratic legislative leaders, were not immediately returned.