I don't know of any good article on the subject, but I think the red/blue war in America is where you can see some of the most extreme examples of this. A simple illustrative example that comes to mind: A politician on the other side of the aisle makes a gaffe, a journalist amplifies the video/text of their statement, based on their followers' reaction a journalist decides if it's something their followers care about and either writes a piece about it with supporting information about just how wrong they are and takes on it from their followers/colleagues or just ignores it and moves on trying to find more red meat for the political partisans that read them.