By Scott Bauer

MADISON, Wis. — A Wisconsin judge on Friday struck down nearly all of the state law championed by Gov. Scott Walker that effectively ended collective bargaining rights for most public workers.

Walker’s administration immediately vowed to appeal, while unions, which have vigorously fought the law, declared victory. But what the ruling meant for existing public contracts was murky: Unions claimed the ruling meant they could negotiate again, but Walker could seek to keep the law in effect while the legal drama plays out.

The law, a crowning achievement for Walker that made him a national conservative star, took away nearly all collective bargaining rights from most workers and has been in effect for more than a year.

Dane County Circuit Judge Juan Colas ruled that the law violates both the state and U.S. Constitution and is null and void.

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