NPR: “He was deflecting and rationalizing away his vulnerabilities, but understanding why Biden hasn’t stepped aside is to understand his politics and the core of who he is as a person. He has faced myriad challenges personally and politically, and those obstacles have defined who he is. Biden is used to people telling him he can’t or he shouldn’t do something, and he believes the naysayers have long been wrong.” “Of course, those obstacles are all very different from the one he currently faces, because Father Time is undefeated.”