Former Vice President Joe Biden appeared to have made some factual errors during a virtual roundtable on Wednesday regarding this claim that he "became a professor" after leaving the Senate. During an online campaign event, Biden took questions from young people and while discussing the student debt crisis, Biden spoke about all the time he had spent on "campus." "When I left the United States Senate, I became a professor at the University of Pennsylvania," Biden said. "And I've spent a lot of time -- and the University of Delaware has the Biden School as well, so I've spent a...