The DNC's big screw up on debate hosts
...Lifson also points out that Trump will have leverage when it comes to the general election debates by telling the Democrat nominee if you want to debate me it will have to be on Fox. If the Democrat nominee resuses he or she will look like cowards.
This is a tacit admission that the party's presidential field is afraid of tough questioning, about, for instance, support for the Green New Deal or for tearing down existing segments of the border wall. Rick Santorum may have been the first to respond with the obvious question: "What are they afraid of?"
Other related question easily follow, such as: "If they are afraid of Bret Baier and Martha MacCallum, how can they face Vladimir Putin or Kim Jong-un?"
The voting public, other than committed Democrats, already understands that all the other TV networks are heavily biased against Republicans, as many polls have revealed for years now (the latest, from Columbia Journalism Review, confirms this). Refusing to face the one major national network that is remotely interested in challenging untruths or asking hard questions looks like cowardice.
Perez has inadvertently de-legitimized all of the debates that will occur on non-Fox outlets. The new blacklist only confirms that the DNC institutionally recognizes that its candidates need "safe spaces" where only journalists biased in their favor are allowed to question their candidates — people like Martha Raddatz of ABC News, a moderator of a 2016 debate, whom Trump mocked for weeping on air as election results came in showing that Trump was going to win the election.
There now will be increased interest in critiquing those debates for the questions that were not asked, or the follow-ups that were not explored.
Perez has confirmed that Democrats have nothing to fear from the other networks, because (the obvious implication goes) they are friendly. He thus drives home the contention that they are fake news media.
A majority of the public doesn't trust the media. Aligning the Democrats with distrusted institutions is not good branding.