Special Counsel Robert Mueller is set to depose three or four current White House officials this coming week, further ramping up the investigation into Russian meddling in the 2016 election. Last week, former Trump campaign manager Paul Manafort and his deputy Rick Gates were indicted on 12 charges. And, the investigation revealed the plea agreement with former Trump foreign policy adviser George Papadopoulos, signed in early October. Former federal prosecutor for the Department of Justice Peter Zeidenberg joins Soledad O’Brien to discuss what this means and where it goes from here.

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