Joe Biden said the White House under President Barack Obama, when Biden was vice president, did not do enough to address the concerns of white working-class voters in the Rust Belt. "A lot of people were left behind," the 2020 Democratic candidate told the New York Times when discussing the post-recession economic recovery. "In areas where people were hard hit, I don't think we paid enough attention to their plight." Biden, 76, tried chalking up the disillusionment of white former Democratic voters to a messaging problem, saying Obama told him he didn't want to take "a victory lap [because] we...