When trying to assess the bias of a news source, it is important to consider any motivations that the leadership may have for telling a story in a particular way. History can be an especially useful tool in determining whether or not a news outlet has an established pattern of presenting stories with a certain slant or point-of-view.

One way to look at this would be by looking back over past articles written by the same author or organization and evaluating how those pieces were framed and what opinions were expressed within them. This could help identify common themes such as promoting particular political ideologies, demonizing other groups or painting certain individuals as either heroic figures or villains depending on their stances on controversial issues. Additionally, it may be worthwhile to investigate where funding for the news source comes from; if it is sponsored by some kind of special interest group then this could indicate that their reporting will always include some degree of bias towards certain topics due to those affiliations.