PBS News Hour

January 30, 2020 (45x22)

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Thursday on the NewsHour, senators continue asking questions in President Trump's impeachment trial as a pivotal vote on witnesses looms. Plus: Legal experts analyze the latest impeachment trial developments, a preview of the Iowa caucus, novel coronavirus is now a global health emergency, the economic power of peer pressure, Malcolm Gladwell on meeting strangers and Gwen Ifill forever remembered.