It’s partly their horse race coverage model, part bias/corruption and part just good old fashion stupidity/ignorance.
Here’s the real state of the race after Joe Biden’s expected win.
It is a Southern Black Democrat Coalition.
Bernie Sander has done very well among Black Democrats NOT in the South, including just behind Biden in Nevada.
By Super Tuesday
Joe Biden will have outsized wins in the South, the region of the country and Electoral Map in which the nominee will have no chance to win come November.
On delegates...
Joe Biden would need to demonstrate he can add Hispanics to his coalition but...
There’s no evidence to suggest he can at this point now and certainly doesn’t have the time to run ads for weeks with whatever money he earns after South Carolina
That leaves the Democratic Party with a difficult choice to make, one which already sounds made.
Corporate media can no longer cover elections competently or honestly.
This is now about depriving Sanders the delegates need to clinch.