I’ve been thinking about this question in a different way recently, and I think this approach is becoming more and more useful to me.
In the 1960s and 1970s, some portions of the political left was criticized by more mainstream America for the lack of adherence to certain norms. Think about hippies and associated rabble-rousers, really. Among those norms that were rejected were various things associated with the modern: rejection of conformity, deep suspicion of institutions, sometimes a very subjective view overriding objective ones, and so on.
I think over the last half-decade or so, many of these elements of postmodern thought started spreading from the counterculture into mainstream society, but not directly in the way those ideas were described at the time. For example, hippies talked about free love, and I wouldn’t say that we have actually adopted that… but we’re a long way from earlier attitudes, too.
So in the last election, building on a very substantial shift in conservative politics stemming from the Tea Party movement, I think we’ve seen the embrace and nearly complete takeover of the Republican Party by postmodern thought.
Trump especially taps into the idea that everyone’s individual perceptions are what is reality: this way of viewing things means that objective reporting (whether science or journalism) has no more reflection on reality than a tripping Deadhead wondering whether the color blue to him is the color blue to you.
When reality is defined as whatever one wishes it to be, people have no reason to believe that they need to reconcile any contradictions in things that they wish to believe versus that which they observe. In a reality-based world, someone having negative opinions about Mexicans would probably have to confront at some point as to whether they are racist. In this factless version of reality, it’s totally cool to hate Mexicans and there need never be any thought on whether that’s racist, because that’s not what the person wants to be.
This is more than just about race, of course. Social conservatives need not reconcile that someone who has their strong support is totally cool with “grabbing them by their pussy” and cheating on his wife with nude models and porn stars. Why? Because that’s a reality that can be totally discarded, because it doesn’t feeeeeel right compared with what they want to do.
The irony in all this is that the acceleration of this trend in believing in nothing thinking has been so rapidly spread by a single individual who is so authoritarian in his ways. Typically authoritarians convince people to surrender to power, as opposed to embrace a sort of nihilism toward objectivity.