Odd, I have read about Yellow Journalism and while the Yellow Kid Journalism was specifically related to the circulation wars in NYC that was never stated as the origin of the phrase Yellow Journalism.
Those rags were actually yellow, often because of cheap paper. They also relied on huge misleading headlines (click-bait), blatant lies, misconstruing the truth and embellishing popular (but incorrect) beliefs. And that was the definition of Hearst and his particular brand of Yellow Journalism.
I suspect they were the original Alt-Right (aka, Post-Truth) publishers. The Alt-Right/Actual-Liars might be the best to document the #IdiotElect and his descendency.