When Jon Stewart announced he would give up his hosting chair on “The Daily Show” after 16 years, almost no one speculated his replacement would be Trevor Noah. In this week’s “Sunday Sitdown,” Willie Geist chats with the popular comedian about his astounding journey from apartheid South Africa where his biracial background was literally a crime to now sitting in that famous chair. Noah also discusses his unique approach to covering today’s politics and breaking through in a crowded late-night field.