"I do, therefore, restrain and enjoin the further implementation of 2011 Wisconsin Act 10," Sumi said, according to a transcript. "The next step in implementation of that law would be the publication of that law by the secretary of state. He is restrained and enjoined from such publication until further order of this court."

If the bureau's action did constitute publication, it could make moot the state's appeal of Sumi's order, now before the state Supreme Court.

That could actually simplify the case that District Attorney Ismael Ozanne is seeking to make on the alleged open meetings violation if he doesn't have to worry about whether a judge has the authority to stop legislation before it takes effect, said Madison lawyer Lester Pines.

"I suspect that if Judge Sumi was willing to take up a (temporary restraining order) against publication I suspect she'd do the same thing on enforcement" of the new law, Pines said.

Pines said it would also open up legal channels for other groups who have been waiting to challenge the law but had to wait until it was enacted.

"This is going to unleash a tsunami of litigation," Pines said.

— The Associated Press contributed to this report.