The notion that Donald Trump was elected president of the United States because of fake news stories going viral is something the liberal media, and CNN’s Brian Stelter in particular, have been harping on for a while now. It was nagging Stelter so much that he dedicated a monologue to it during “Reliable Sources†on Sunday. “Now, to be clear, fake news infects the left and the right,†he noted at one point, “but the evidence indicates this is more of a problem on the right, among some, not all, but some Trump supporters.†He said that researchers needed to...