evidence: And that was not that unusual. If you go back to the 2012 campaign, there were pro-Obama PACs that ran ads saying that Mitt Romney was responsible for the cancer death of a steel worker’s wife. That was simply untrue, but it ran. If you go back and read the critics of the Tea Party—and I was a critic of the Tea Party—the language that was used against it was extraordinary, comparing them to jihadists. [...] Take, for example, the process by which a lot of people on the right convince themselves that having a gun in the house makes them safe, in the face of all the evidence that it doesn’t: They’re doing the exact same exercise as people who believe they know better than their doctor about autism, or that Big Pharma is lying to you about how you can cure cancer.