evidence: Joe Biden is slammed for lying that he taught political theory at the University of Pennsylvania for four years - despite serving as honorary professor for two and never teaching a single class - Biden, at 80, the nation's oldest-ever president, was speaking at Prince George Community College in Maryland Thursday - 'I taught at the University of Pennsylvania for four years and I used to teach political theory,' he claimed - However, while Biden served from 2017 to 2019 as the Benjamin Franklin Presidential Professor of the Practice, there is no record of him teaching classes President Joe Biden made a bizarre claim in a speech that he'd taught political theory at an Ivy League university - despite only serving there as a visiting fellow and honorary professor. [...] 'We got to fight for it,' Biden said. ''I taught at the University of Pennsylvania for four years and I used to teach political theory. And folks, you always hear, every generation has to fight for Democracy.'