The Sisters of St. Joseph of Orange are locked in a clash with a union that wants to organize at a chain of hospitals the nuns operate throughout California. Service Employees International Union United Healthcare Workers-West is seeking to unionize more than 8,000 caregivers, as well as cafeteria workers and X-ray technicians, at five St. Joseph Health System hospitals—three in Orange County and two in Northern California. The union has alleged a variety of anti-union tactics, which the nuns have denied.