  In an era marked by an abundance of news sources, access to information
significantly influences public opinion. Notably, the bias of news sources
often serves as an indicator of individuals' political leanings. This study
explores this hypothesis by examining the news sharing behavior of politically
active social media users, whose political ideologies were identified in a
previous study. Using correspondence analysis, we estimate the Media Sharing
Index (MSI), a measure that captures bias in media outlets and user preferences
within a hidden space. During Argentina's 2019 election on Twitter, we observed
a predictable pattern: center-right individuals predominantly shared media from
center-right biased outlets. However, it is noteworthy that those with
center-left inclinations displayed a more diverse media consumption, which is a
significant finding. Despite a noticeable polarization based on political
affiliation observed in a retweet network analysis, center-left users showed
more diverse media sharing preferences, particularly concerning the MSI.
Although these findings are specific to Argentina, the developed methodology
can be applied in other countries to assess the correlation between users'
political leanings and the media they share.
