As does CNBC and CNN, admittedly to a far lesser degree, except theirs is the "correct" bias.
CNBC is business news; did you mean MSNBC?
MSNBC has the least viewership of the three and I would not consider it particularly influential. It is biased towards a minority ultra-Democrat position, hence its relatively lower viewership due to its fringe editorial content.
Lest ye be Roy Moore’d (or Anthony Weinered), it is a mistake to take a bad actor and extrapolate isolated statements or conduct to the greater organization without evidence of a trend.
However, CNN is the topic. Don’t think for a minute if Trump or another Republican achieves greater than 50% popularity, CNN won’t swing that way. Negative coverage of Trump was en vogue before CNN started doing it, not the other way around.