Second coronavirus case of unknown origin confirmed in U.S., had no known contacts with others infected; Trump allies downplay concerns about virus; Pence defends Trump's decision to put him in charge of coronavirus response as his record is scrutinized;

Erin Burnett OutFront

U.N.: The window for containing the virus is "narrowing"; Bill Gates: Coronavirus behaving like "once-in-a-century pathogen"; Donald Trump Jr.'s outrageous claim: Dems are hoping coronavirus "comes here and kills millions of people"; Stock market caps worst week since 2008 financial crisis; Bernie Sanders outlines funding for his plans after saying he didn't know how much they would cost; Trump nominee for DNI withdrew from consideration last summer after embellishing NAT-SEC credentials; New evidence warned Columbia decades ago about doctor accused of assaulting Andrew Yang's wife;

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