Imagine a camel named "Credibility."  Every story by the media is a straw. When you engage in fair and unbiased reporting, then that straw weighs nothing - absolutely nothing.  Instead, it feeds the camel and makes it  stronger. BUT, when you push personal political agendas, selectively editing matters to misrepresent the truth, use lying anonymous sources, and try to make the news or be the center of the news instead of simply reporting it, and all the other BS that lacks ethics and integrity, then that straw starts to weigh a lot.  The media has lost all credibility not because of Trump.  The President has simply exposed you for what you are.  (And you hate him for it!) He is helping the people to see your conduct for what it is - straws that strain all credibility.  Each time your BS is revealed, another straw is added to the credibility camel's back.  Eventually, Credibility's back will break.  Basically, the media is committing suicide on an installment plan - one straw at a time.