There is no liberal media bias in which news stories journalists choose to cover
science.org
science.org
I'm probably much more sympathetic to traditional journalism than many, but there is definitely bias in media (conservative and liberal) and the way it operates is far more subtle and/or complex than anything examined in the article.
* Was this a “commissioned” study with the outcome decided before the data was collected in order to appease a benefactor with an agenda? * Is this a means to cover up liberally biased funding? What about liberally biased science? * Was this designed to give people a quick “Gotcha!” article to cite (Trust the science!) in order to sway public opinion and silence people who argue that there is a liberal bias in media?
Or it could be none of those things and may just be one more paper for the publication count. You just have to consider who has what to gain from a study with poor data and a decisive conclusion on an arguably subjective but very political topic.
That is about the least ideologically charged story I could imagine. E.g. has "Unknown <republican>/<democrat> runs for office" ever gone viral among liberals or conservatives? It is exactly the kind of story I would pick if I wanted to make sure the experiment did not detect any bias.
"White kills black"/"Black kills white" would have been a much better test, as those are the kind of stories that generate the most outrage and attention.