Antifa isn't Partisan, it's Anarchist. They'll be rioting cross-country again regardless of who's the President.
And they can't "win" in the ordinary sense of the word, because as soon as any kind of leadership emerges, the rest will immediately turn on them. They will, however, make themselves targets that a Rat Administration would target and kill. The Rats do "Authoritarian" better than we do. Sometimes people forget who Hitler's #2 target was in the Holocaust.
This is a bit of a bright spot if the Rats steal this election, if you can call it that: The jackboots will have to clean out the Anarchists before they can come after us in force. Even evil Stalinists understand who's the greater danger to themselves.