When starting to answer the first question, Biden should have made a quick introductory statement that included a brief notice that he was fighting off a case of laryngitis and his Voice seem a little raspy. That would've given everyone time to adapt to his impaired voice. The second thing his coaches should've told him to do, would've been to warn him that if he loses train of thought regarding a question he was in the middle of answering, he should simply be honest and admit it this way, "Pardon me I just lost train of thought, could you repeat the question?"
He's also got to remember to NOT to leave his mouth a gape when his opponent responds to questions.
Political communications experts always remember a prime lesson of the Kennedy-Nixon debates: "When on television the visual nessage means more than the verbal message."
The more Vance speaks, the stupider he sounds!