Amanpour: Matteo Salvini, Sienna Miller, Doris Kearns Goodwin

Matteo Salvini, Italy's Deputy Prime Minister and leader of the populist group Northern League, talks to Christiane Amanpour about the EU, immigration and climate change. Sienna Miller, the British-American actress, opens up about the making of her new film "American Woman" and life in the public eye. Our Walter Isaacson speaks with Pulitzer-prize winning historian Doris Kearns Goodwin.

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