Barbara Boxer, the former Democratic Senator from California, and Elie Honig, a former federal and state prosecutor, join Christiane Amanpour to discuss House Speaker Nancy Pelosi launching impeachment proceedings and the phone call between President Trump and Ukrainian President Volodymyr Zelensky. Dara Khosrowshahi, the CEO of Uber, talks about the criticism his company has attracted and the company's future. Our Hari Sreenivasan talks to Director Orlando von Einsiedel about his new Netflix documentary, "Evelyn," that deals with the suicide of his brother.

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