The polar vortex sliding south into the Midwest is sending temperatures to their lowest levels in more than 30 years, and in some cases, setting records.
The polar vortex, which usually sits over the Arctic, is being pushed south by an unseasonably warm air mass to the north.
Roughly 80 percent of voters say they are concerned that the negative tone and lack of civility in Washington will lead to violence or acts of terror, according to a new NPR/PBS NewsHour/Marist poll conducted after the recent deadly shooting at a Pittsburgh synagogue.
President Trump leaves Thursday for the G-20 in Buenos Aires, Argentina, with a packed schedule ahead of him and a number of looming questions that could determine whether the trip is a success or a mess.
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