Is there really any question about who popularized that meme?
Lots of people complained that the media was biased before. That's not new. But the notion that the MSM (whoever they are) actually spread "fake news" is a Trump special. He gets caught lying by the media, and then tells his base that it is fake news. "Fake news", "enemy of the people". That's not Reagan or the Bush's complaining about media bias. That's Trump.