This is going to happen
Those European intel agencies are telling us something we ought to be able to say we already knew. And, whatever particular narratives they push, right wing media will magnify Russian black propaganda. There is a natural affinity and allegiance in these two crowds. But an entity such as Fox will be targeting it's base, already converts. The Russian activities will augment other GOP messaging strategies (Warren = Pocohantas = liar = stealing American Indian heritage) and push them via social media into the mainstream media (which is losing its position as data source for citizens).
We'll see all of this broadly, including here. It will be a reprise of "Clinton corruption", of Sanders with a halo and Hillary (whoever becomes the Dem candidate) as a screeching shrew or as a snooty, elitist empty suit (who was not a hero in war but actually a coward).
So, understand that folks on this site who behave precisely as I'm saying, are either dupes (most likely) or in on the game.