From the WSJ 

Republican senators in Wisconsin passed legislation stripping public employees’ unions of nearly all collective bargaining rights.
A vote on Gov. Scott Walker’s “budget-repair” bill had been stymied since Feb. 17 when 14 Democratic senators left the state. Without the Democrats, the senate lacked a quorum to vote on fiscal legislation.
On Wednesday night, Republican senators convened and removed fiscal items from the bill so that they could vote on other issues, including the collective bargaining rights of public employee unions. The vote to pass the remaining bill was 18-1.