Fox news, and other right-wing outlets, are the only ones who will report truthful negative stories on media companies or politicians that are Democratic party aligned. The centrists closed ranks as a result of what they consider the twinned media failures of Corbyn and Trump. They simply agree as a group not to report on things that are potentially damaging to Democratic centrist candidates or agendas, because they feel that truthful reporting is what sank H. Clinton.
Any of them will explain to you how reporting the facts created a false sense of equivalence between Clinton and Trump for voters. Voters couldn't understand how Trump bragging to a frat boy reporter that he could just grab pussy, his using a nonprofit as a vehicle to dodge taxes on a painting, and his denial that McCain was the best hero were far worse than the 1994 Crime Bill, superpredators, Clinton Foundation associations with dictators, the Iraq War, Russian uranium, Haiti, and Honduras.