The move came as state representatives prepared to kick off debate at 9 a.m. Thursday that could last 24 hours. Gov. Scott Walker said he would sign the bill by Monday.
Throughout his pitched battles with labor, Gov. Scott Walker has inspired overwhelming disapproval from union households in the public sector.

But union households in the private sector have been more evenly divided.
In an order issued late Wednesday, the court told attorneys in the case to file briefs spelling out whether they believe the public should be prohibited from attending all or part of the arguments.