Five SEIU groups, which represent workers in health care, public services, and property services, made their endorsement Saturday at a rally outside 32BJ SEIU’s union hall in downtown Boston.

Mayor Michelle Wu had a great Saturday: her bid for a second term was endorsed by five Service Employees International Union groups, representing 135,000 Massachusetts workers. “SEIU members have a tradition of deep political engagement,

Mayor Michelle Wu, days after answering questions in front of a congressional committee, was endorsed by five workers’ unions consisting of 135,000 people statewide.The 32 BJ Service Employees International Union emphatically welcomed Wu in their downtown Boston headquarters Saturday afternoon.