http://time.com/money/4533729/hillary-clinton-journalist-cam...
There are plenty more if you Google around. And they go back way before Trump was on the scene.
I'd be interested to see studies that dispute these findings. I haven't seen any.
A fair reporting of Trump comes across in a very bad light. I guess that's unfortunate for him, but it's of his own making.
The real question is whether anything reported on him (or the right at large) are erroneous, as he has claimed hundreds of times ("lies" and "fake" specifically), because the very few times it has happened, it was publicly retracted, and most often people got fired for it. I think that's a marker for healthy news.
https://www.opensecrets.org/news/2010/09/media-professionals...
http://dailycaller.com/2010/08/28/obama-democrats-got-88-per...
May I suggest that it's not causation?
Other large outlet headquarters:
Fox News: New York City
Breitbart: Los Angeles
Infowars: Austin
A slight change in your text:
> virtually all large [any type of corporation] are clustered around liberal metropolitan areas
1) Links to studies?
2) Having a leaning in op-eds doesn't mean a bias in facts reported. I'd assume if you have 0 bias there would be no point in lying about facts, but regardless of left-leaning or right-leaning organisations, the real issue is whether you present truth or not.