Also I would like to point out that, as someone who has worked for multiple news agencies, including one of those five named in the link above, there really is no such thing as a massive liberal media.
The vast majority of the decisionmakers at the top are conservative with a few more liberal thinkers sprinkled in here and there. Only the rank and file has several liberal people and many of the reporters and editors I worked with there were leaned more toward the conservative. Whatever I thought about anything never made a difference in how I reported it, as least not purposely. Since we are all human, no doubt there is never true, absolute objectivity.