NEW: Mike Bloomberg's campaign is preparing a media onslaught against Bernie Sanders. Opposition research, more digital ads, op-eds and surrogate TV appearances are all in the works to attack the Democratic front runner.

NEW: Mike Bloomberg's campaign is preparing a media onslaught against Bernie Sanders. Opposition research, more digital ads, op-eds and surrogate TV appearances are all in the works to attack the Democratic front runner. https://t.co/AZ1lXEFyif

— Brian Schwartz (@schwartzbCNBC) February 24, 2020