The sort-of myth of the media bubble:
Consider, for instance, the simple math of TV ratings. There are about 122 million Americans who told the Census Bureau that they voted in 2018. The vast majority of those voters don’t watch partisan cable news. FOX News and MSNBC pull in around 3 million viewers when their top hosts are on air. In contrast, around 5 million people tune in to each of the network nightly news shows. More Americans have a centrist media diet than a slanted one. And most Americans are basically fasting.
Still, a small percentage of the electorate have a highly partisan media diet, and if they’re the most engaged they can have an outsized influence.