It's not clear whether leaders of AFSCME DC 47 are interested in joining their DC 33 colleagues on the picket line.

Negotiations are paused between DC 33 and the City of Philadelphia as the city's largest strike in nearly 40 years continues.

AFSCME District Council 33 represents 9,000 employees ranging from sanitation workers to crossing guards. Trash pick-up, pools and 911 calls are among the services impacted.