President Trump officially on trial as impeachment proceedings kick off, Hillary Clinton unleashes on one-time rival Bernie Sanders, and first U.S. case of deadly mystery virus confirmed.

Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT (or check your local listings).

1:09 Trump's Impeachment Trial Begins With Fierce Senate Battle

5:11 McConnell Unveils Last-Minute Surprise In Rules Debate

6:09 Trump Calls Impeachment Trial A 'Hoax' At Davos Conference

6:52 Trump Clashes With Climate Activist Greta Thunberg At Davos

7:43 Ukraine's President Expected At Davos Summit Tomorrow

7:57 Opening Arguments Expected In Trump's Trial Tomorrow

8:50 Hillary Clinton Slams Bernie Sanders: 'Nobody Likes Him'

10:11 First U.S. Case Of Deadly Mystery Virus Confirmed

12:21 Oprah Winfrey Breaks Silence On Controversial Documentary

14:10 Dangerous Deep Freeze & New Storm Threat On The Move

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