Joe Biden held his first official campaign rally in Pittsburgh Monday (watch above). The Pittsburgh Post-Gazette reports:

Hours after announcing that his Pittsburgh-based International Association of Fire Fighters was endorsing Joe Biden for president, union president Harold Schaitberger kicked off the first rally of Mr. Biden’s quest for the Democratic nomination at a Lawrenceville union hall Monday to chants from the crowd of “We want Joe!”

“This is a union town. This is a union state. This is a union county,” Mr. Schaitberger said.

Those words may sting for Donald Trump who expressed his disdain this morning after the IAFF endorsed Biden.

Biden has already shown he isn’t scared to fire back at Trump.

Biden heads to Iowa tomorrow.