Labor and immigration leaders joined Vermont Sen. Bernie Sanders outside Philadelphia City Hall for the "For the Workers, Not the Billionaires May Day Rally."

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.

Sen. Bernie Sanders made an appeal to Pennsylvania lawmakers at a May Day rally outside of City Hall on Thursday. “I’m here in Pennsylvania to tell any member of the Pennsylvania delegation that if they vote for tax breaks for billionaires and cut Medicaid,