The Republican-controlled House has voted to stiffen fines for mass picketing and to require that judges halt illegal demonstrations such as obstructing access to businesses and roads.
Democrats say the bill approved Wednesday is unconstitutional and current penalties are working.
In Michigan, it’s a misdemeanor for strikers or demonstrators to hinder or prevent the pursuit of lawful work. Violators can get jail time and a $500 fine.
The legislation sent to the Senate, which was approved mostly along party lines, would impose a fine of $1,000 per day, and unions or organizations sponsoring a picket would be fined $10,000 per day.
The House also voted to eliminate a requirement that employers advertising for replacement workers during a strike tell new workers that they’d be replacing employees involved in a labor dispute.