A lot of us have this idea that the truth has a kind of magical power, that if the truth is out there it will convince the country to unite behind it. But this isn't so. People can simply decide to not believe a version of events now. They can shop for information the same way they'd shop for everything else, and they pick the reality they find most pleasing.
Back when I was thinking about the rapture movement or the 9/11 truther movement, what struck me was that there are bubbles now that you can stay in and you don't have to engage with reality if you don't want to. So it occurred to me that in the future, people might decide en masse to completely tune out. Even the idea of having a debate with people about a commonly accepted body of facts seemed to be slipping away at the time.
And that's kind of what happened in this election. It was one group of people believing one thing and another group of people seeing something completely different.