Dan Pfeiffer, former Senior Advisor to U.S. President Barack Obama for Strategy and Communications, who was instrumental in Obama's election had this to say:
The Sanders campaign is a grassroots campaign that threatens the status quo media and pundits. When Obama was running for POTUS, especially in his first term, he was also considered the insurgent, anti-establishment candidate.
This election there may be even more pushback against the anti-corporate Sanders, who criticizes Main Stream Corporate Media as a great part of our problems.
When the disconnect between MSM and the people becomes too apparent, Pundits will come around after a few winning primaries as they finally did with Obama.
In some cases the disconnect is becoming laughable. Check out the cognitive dissonance at CNN:
Of course, Time Warner, the parent company of CNN is one of Hillary's
major donors. So there is that.