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    00:51
  • Virginia Walmart mass shooter was disgruntled worker: Source

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  • Randi Weingarten: Pompeo making it harder for teachers to teach

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  • Joe: Trump thought SCOTUS justices would be like Judge Cannon

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    06:44

What is synthetic marijuana?

01:30

With 2015 being the worst year on record for synthetic marijuana overdoses, there’s a strong push for the federal government to do more to regulate the sale of the drug. Tony Dokoupil, host of ‘Green House’ on Shift at MSNBC.com joins Tamron Hall on NewsNation.