I believe Operation Mockingbird is an outgrowth of FDR's policies with the Office of War Information (OWI), which was penetrated by Soviet agents, and the left-wing bias in the media has its roots there.
Good to 'see' you.
It certainly is interesting, isn't it? I didn't get as far back as FDR, most everything seems to try to tack it to Hoover.
The Kennedy admin links are fascinating.
I've come across something, somewhere where GHWB outlawed this stuff...