SCRANTON, Pa.—In a bid to appeal to the working class voters who helped propel President Trump to the White House in 2016, Democratic presidential candidate Joe Biden returned to his hometown of Scranton Wednesday to deliver a rebuke of Mr. Trump’s economic policies and values.
Hours before Mr. Trump was poised to touch down on the other side of the state in Pittsburgh, Mr. Biden, who faces a crowded Democratic primary field, refocused his message on a general election argument against the president, suggesting Mr. Trump had...