To simply chalk this up only to TDS is foolish. Sure, there's plenty of that in the mix, but if journalists didn't have such a fondness of governmental officials of all kinds this would have been a simple "the President is wrong, the experts say" report and everybody would have moved on. That's how they did for Obama.
The outrage is, in part, because government is God for these people. Experts aren't quite so expert after all. Watching the news, there have been many discussions about how much wasted time the sharpie'd up map created, which again drives the point. Why is the most trust placed in government of all places? Well, because they are progressives. Ideologically, they are compelled to it.
As progressives, they trust government first and they will always trust government first, and this goes right back to the birth of objective journalism. In Walter Lippmann's book Public Opinion, he writes the following: (page 338)
Newspapers do not try to keep an eye on all mankind. They have watchers stationed at certain places, like Police Headquarters, the Coroner's Office, the County Clerk's Office, City Hall, the White House, the Senate, House of Representatives, and so forth. They watch, or rather in the majority of cases they belong to associations which employ men who watch a comparatively small number of places where it is made known when the life of anyone ...... departs from ordinary paths or when events worth telling about occur."
See, what really is "good journalism" then, when they aren't actually investigating things. They are just going to government offices and reporting on whatever they can find there.
Note that this was written in 1920. The media has been having a love affair with government for longer now than anybody has been alive.