It's not obvious from the LWN article, but the reason it says "White House" is that lawyers from the DoJ have filed an Amicus Curiae ("Friend of the Court") brief informing them of their stance on the topic. [1] [2] [1] - http://arstechnica.com/tech-policy/2015/05/white-house-sides... [2] - http://cdn.arstechnica.net/wp-content/uploads/2015/05/google...
Is the term "White House" often used to refer to anything within the executive branch? I have always assumed it meant the office of the President and perhaps his cabinet...
It does not include law enforcement or intelligence agencies, nor cabinet-level departments. So "White House" does not mean FBI, DEA, Department of the Interior, etc. However, the term "Administration" or " Administration" does include these entities.