After Sanders’s speech, protesters marched throughout the city and, in some instances, ignored requests by local police to clear the way for rush hour traffic.

A massive crowd gathered at City Hall in Philadelphia Thursday for a May Day rally and to see Vermont Sen. Bernie Sanders speak. The "For Workers, Not Billionaires" rally on the north side of City Hall drew a large crowd and shut down streets in the area.

Railing against “tax breaks for billionaires” and issuing a warning to Pennsylvania lawmakers, Sen. Bernie Sanders delivered a firebrand speech Thursday afternoon to a crowd clustered outside City Hall.