What "controlling the media" really means

(updated below)

Hypocrisy is far too common a feature of our political culture to comprehensively chronicle, particularly when there is a change of party control and each side starts doing exactly that to which they spent the last several years vociferously objecting; see here for a vivid example of that dynamic, from a new Pew poll released today: 

The belief that the press should keep political leaders from doing things that should not be done often depends on who those...