Hundreds of local union members rallied in downtown Pittsburgh on Monday, then marched through city streets to voice their concern over a case being heard by the U.S. Supreme Court that they believe is funded by big business and could threaten unions.

The march was organized by the Service Employees International Union. It was one of several hundred similar events held around the country.

Chanting things like “when we fight, we win” and “together we rise” union members marched down Grant Street, taking care to walk by the federal building, the county and federal courthouses, and the headquarters of UPMC, which has sparred with the SEIU in the past over organizing health care workers.