The way this works is that say you know that someone is an unemployed auto worker and you make up phony internet placards misrepresenting Bill and Hillary Clinton as anti-labor.
And you set it up so that once the person clicks on one such piece of propaganda, they are presented with several more links of the same ilk. And then so are all their Facebook friends. So you create a Matrix world in which auto workers should give Trump a chance because the Democratic Establishment has failed them (which, even if the second part of this proposition is true, is a non sequitur). And you set it up so that that is what people in Detroit and Flint and Ypsilanti are talking about with one another, on line and off line, what they are liking on Facebook, what they are sharing on their timeline.
And then Trump wins Michigan.
AP notes that Chris Wylie, a Cambridge Analytica co-founder, told NBC, “This is based on an idea called ‘informational dominance,’ which is the idea that if you can capture every channel of information around a person and then inject content around them, you can change their perception of what’s actually happening.” He called it “fake news to the next level.”