Rachel, Lawrence ask 'Could McMaster's replacement be an...

The Last Word with Lawrence O'Donnell 3/15/18
Rachel, Lawrence ask 'Could McMaster's replacement be an...

Amid reports that President Donald Trump will remove his National Security Advisor, Lawrence O'Donnell asks: H.R. McMaster was an upgrade from Michael Flynn — any chance of another upgrade? Rachel Maddow breaks it down. Duration: 3:45