NPR, huffpo, WSJ all have their biases and a narrative they want to present for their core audience, otherwise, why would they diverge on how they present the same topic and why do the topics they cover differ?
NPR is always the underdog. They also make good use of techniques to put things in whatever perspective they want. Softball questions to sympathizers, leading questions, etc. If you study propaganda, they use pretty much all the techniques. Obviously this is why they and Glenn beck and co sound the same.
You don't need a cabal, you need a head of news, producers and journalists who share the same interests. Just make it all line up organizationally.