Amanpour and Company - July 22, 2020

Sen. Bernie Sanders explains why he thinks Joe Biden could be the most progressive president since Franklin D. Roosevelt. Persepolis creator Marjane Satrapi discusses her new film “Radioactive,” based on the life of Nobel Laureate Marie Curie. Author Thomas Chatterton Williams joins Walter Isaacson to discuss “cancel culture” and his book “Self-Portrait in Black and White.”