Biden has many stressors, most with his own voters.
Indeed Trump knew that Biden had spent months committing those answers to memory and Biden wouldn't be able to address Trump. Petty name calling was all Biden had.
Very good point, some moderators have also pointed out that Bidenâs answers and comments were obviously rehearsed. I think Trump was trying to push him and force him off script. It was also obvious Wallace was trying to protect Biden.