This is a very good decision - indeed it is a necessary decision.
Quote:DNC bars Fox from hosting presidential debate
Party Chairman Tom Perez cited what he called the network's "inappropriate relationship" with Trump and his administration.
NBC
Of course, Fox has been doing propaganda long before Trump's arrival. It is just that presently it is much more apparent (to casual news followers). The DNC could have and should have done this long ago. They, like most of the mainstream media, have been too cowardly to identify Fox as a propaganda operation. This failure has really damaged US democracy and there is a real possibility that this damage is not reversable.
American conservatism has used the "There is a war against us" metaphor to describe changing social and political values since the post-Goldwater period. For many of the evangelical sort, this "war" is understood in religious terms (the great over-arching battle between Good and Evil in the universe), for others the "war" is seen as threats to continued white cultural domination, and for yet others it is seen as a battle to protect the sacredness of profit-taking (and this one is rich in the social-darwinism that sees society as nothing more than a contest for dominance - it's a jungle out there and the people who rise to the top are the natural and appropriate rulers of all others).
So, let's accept that we're in a war. Let's crush these selfish bastards before they **** up the world for everybody.