Ninety percent of the team identified as liberal, including the copy editors, who essentially had the final approval on topics. If a source came up that may have been less credible to a liberal reviewer — like Breitbart or another publication like that — it would require more extensive secondary sourcing. However, if there was an article that came from a more liberal-slanted publication, it was essentially given less critique and was a more viable topic from the get-go.
Source: Confessions of an ex-Facebook trending news curator: ‘They are just going to get rid of the product altogether’ – Digiday
A May 2016 report suggested that Facebook’s trending news section was “curated” to censor certain viewpoints.
As this blog notes, many people use FB for the purpose of disseminating propaganda, usually related to government political and policy issues.
Several groups discovered they can use social media platforms to disseminate propaganda posters that elicit quick emotional responses – which are widely shared. Many encourage a click through – to a separate web site that runs ads, turning propaganda into a profitable business activity.