THE 2016 PRESIDENTIAL ELECTION SHOOK the foundations of American politics. Media reports immediately looked for external disruption to explain the unanticipated victory—with theories ranging from Russian hacking to “fake news.”
We have a less exotic, but perhaps more disconcerting explanation: Our own study of over 1.25 million stories published online between April 1, 2015 and Election Day shows that a right-wing media network anchored around Breitbart developed as a distinct and insulated media system, using social media as a backbone to transmit a hyper-partisan perspective to the world. This pro-Trump media sphere appears to have not only successfully set the agenda for the conservative media sphere, but also strongly influenced the broader media agenda, in particular coverage of Hillary Clinton.
While concerns about political and media polarization online are longstanding, our study suggests that polarization was asymmetric. Pro-Clinton audiences were highly attentive to traditional media outlets, which continued to be the most prominent outlets across the public sphere, alongside more left-oriented online sites. But pro-Trump audiences paid the majority of their attention to polarized outlets that have developed recently, many of them only since the 2008 election season.
Attacks on the integrity and professionalism of opposing media were also a central theme of right-wing media. Rather than “fake news” in the sense of wholly fabricated falsities, many of the most-shared stories can more accurately be understood as disinformation: the purposeful construction of true or partly true bits of information into a message that is, at its core, misleading. Over the course of the election, this turned the right-wing media system into an internally coherent, relatively insulated knowledge community, reinforcing the shared worldview of readers and shielding them from journalism that challenged it. The prevalence of such material has created an environment in which the President can tell supporters about events in Sweden that never happened, or a presidential advisor can reference a non-existent “Bowling Green massacre.”
We began to study this ecosystem by looking at the landscape of what sites people share. If a person shares a link from Breitbart, is he or she more likely also to share a link from Fox News or from The New York Times? We analyzed hyperlinking patterns, social media sharing patterns on Facebook and Twitter, and topic and language patterns in the content of the 1.25 million stories, published by 25,000 sources over the course of the election, using Media Cloud, an open-source platform for studying media ecosystems developed by Harvard’s Berkman Klein Center for Internet & Society and MIT’s Center for Civic Media.When we map media sources this way, we see that Breitbart became the center of a distinct right-wing media ecosystem, surrounded by Fox News, the Daily Caller, the Gateway Pundit, the Washington Examiner, Infowars, Conservative Treehouse, and Truthfeed.
Our analysis challenges a simple narrative that the internet as a technology is what fragments public discourse and polarizes opinions, by allowing us to inhabit filter bubbles or just read “the daily me.” If technology were the most important driver towards a “post-truth” world, we would expect to see symmetric patterns on the left and the right. Instead, different internal political dynamics in the right and the left led to different patterns in the reception and use of the technology by each wing. While Facebook and Twitter certainly enabled right-wing media to circumvent the gatekeeping power of traditional media, the pattern was not symmetric.
The size of the nodes marking traditional professional media like The New York Times, The Washington Post, and CNN, surrounded by the Hill, ABC, and NBC, tell us that these media drew particularly large audiences. Their color tells us that Clinton followers attended to them more than Trump followers, and their proximity on the map to more quintessentially partisan sites—like Huffington Post, MSNBC, or the Daily Beast—suggests that attention to these more partisan outlets on the left was more tightly interwoven with attention to traditional media. The Breitbart-centered wing, by contrast, is farther from the mainstream set and lacks bridging nodes that draw attention and connect it to that mainstream.
https://www.wgbh.org/news/2017/03/15/politics-government/major-new-study-shows-political-polarization-mainly-right-wing
https://www.cjr.org/analysis/breitbart-media-trump-harvard-study.php
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