Any question Wallace asks Biden, even softballs, will probably cofuse and bewilder him. He has only recently answered pre screened questions with the help of teleprompters and ear microphones. It will be hard to cover up or edit any gaffes on live television. If it goes very badly, Harris will be the nominee by October 3.
Will he ask President if he will concede and accept the election results? Will he ask Biden the same?
Remember Trump was asked that question but not Hillary.
Joe Biden will be fine. His handlers will give him a cocktail that will make him appear to be his old, vibrant self.