Senators demand Mark Zuckerberg testify on Cambridge Analytica scandal

In the wake of Facebook's massive data privacy scandal, Mark Zuckerberg told CNN Tuesday night that he might not be the best person to testify if it were to come to that. 
But two U.S. Democratic Senators have called for Zuckerberg' personal testimony in front of the Senate Committee on Commerce, Science, and Transportation.
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Sen. Edward Markey and Sen. Richard Blumenthal also want the CEO to answer more questions