… Today, political parties are no longer just the people who are supposed to govern the way you want. They are a team to support, and a tribe to feel a part of. And the public’s view of politics is becoming more and more zero-sum: It’s about helping their team win, and making sure the other team loses.
Partisan tribalism makes people more inclined to seek out and believe stories that justify their pre-existing partisan biases, whether or not they are true. …
Partisan bias fuels fake news because people of all partisan stripes are generally quite bad at figuring out what news stories to believe. Instead, they use trust as a shortcut. Rather than evaluate a story directly, people look to see if someone credible believes it, and rely on that person’s judgment to fill in the gaps in their knowledge. CONT.
Amanda Taub, New York Times