Norman Ornstein joins Christiane Amanpour to give a glimpse into the inner workings of Congress as the impeachment inquiry unfolds. Robert Reich examines PG&E's role in the California fires. Cynthia Erivo and Leslie Odom, Jr. discuss their roles in the new film "Harriet." Ocean Vuong sits down with Michel Martin to discuss race, sexuality and his new novel "On Earth We're Briefly Gorgeous."