After the debate, Dr. Fauci weighed in on Biden's performance

Former Chief Medical Advisor to the President of the United States Dr. Anthony Fauci dodged questions about Joe Biden 's health after the president's concerning debate performance.

Dr. Anthony Fauci is sharing the lessons he's learned from his decadeslong career in public health. CBS News chief Washington correspondent Major Garrett sat down with him to discuss his new book "On Call" and President Biden's debate performance.