I know this is an impossible question, the future is chaos, but we can at least identify and discuss some key factors.
When I say "successful leftist revolution" I mean one that happens soon enough to prevent, or have non-negligible odds of preventing, the collapse of human civilization as we know it due to climate change.
In all likelihood I think we're fucked as far as climate change is concerned, but we should still try to improve our odds. There's no prize for correctly predicting that we're fucked.
I don't think trump is going to go for the reelection after his two terms. He will choose a succesor, with whom he will campaign extensively, and it will become a party dictatorship, similar to what happened with PRI in mexico, where the election norms are observed only in name. This will let libs keep on with their life because "democracy" isn't under threat, so the GOP sponsors can continue to run the country from their country clubs.
That does sound way more practical. Plus his successor would probably end up being one of his kids. Cool monarchy shit.
You KNOW the trump nutters can't wait to vote for his family.