The news presented to the general population via TV, radio or newspaper should be only the actual facts and only the truth.  I believe for a newscaster it is almost impossible to be completely unbiased.  Even in a traffic accident they have to report who is involved, and their background and other personal details influence the way they report such an incident.   Unfortunately it seems that only the bad news is the main subject to be aired.

In the realm of politics the bias of news persons is more obvious. If the person is a Republican they will definitely be somewhat biased against any Democratic candidate.  By the same token a newscaster who is a strong Democrat will have a hard time praising or being in favor of a Republican candidate.  The solution for this problem is that people should only listen to and understand what a candidate has to say directly, in person, and not reported second hand through a newscaster.