I would like to understand why you on the left approve of our media being in the tank for one candidate
While there may be some media outlets that are "in the tank" of various politicians, there is no credible evidence that major news networks are. The mere fact that any news outlet communicates information that differs with what anyone wants to believe is true does not make the organization "in the tank" of anyone. If there's to be any bias among the major news outlets, it's found in the degree of completeness and comprehensiveness of factual information provided. (FWIW, that's why I tend to prefer PBS Newshour. That network is given to presenting a far more complete news presentation -- as compared with editorial discussion -- of matters.)
It is also essential that one, when consuming content from a news organization, be cognizant of what is news and what is editorial commentary. As goes the news content delivered by major news networks, Fox, CNN, ABC, CBS, NBC, PBS, and others, very little to none of it is biased one way or the other. As goes the editorial content, there is often bias, but then that's the whole point of delivering commentary on the news.