Fallows picks up this great video of Norah O'Donnell actually calling a spade a spade in this interview with Paul Ryan. I think he's on to something with this:
It is hard for political journalists to know enough about the substance of obscure budget votes to go up against a famed "numbers wonk" from the Budget Committee; harder still for a journalist to be sure enough of their knowledge, in the real-time pressure of live TV, to say "no, that's not right" to a national figure; and perhaps hardest of all for a mainstream network correspondent to take on the responsibility of saying, "This does not seem true," rather than just finding some credentialed "critic" to quote to that effect. I've mentioned before some signs of the mainstream media groping to figure out its role in the "post-truth" era. This is an encouraging sign.