It comes down to whether it's even possible to pull off a Bolshevik/Cultural Revolution-scale purge in a first-world country. I think it worked in Russia and China mainly because they were peasant societies before the revolution, so the vast majority of people were used to keeping their heads down and meekly accepting whatever the new boss said unless it directly threatened them (ironically
the Bolsheviks fucked up the food badly enough to get a peasant revolt), in which case they'd have no allies. Plus they had the advantage of essentially importing modernity (albeit a commie knock-off version) so any holdouts would likely be using a horribly outdated power structure compared to the Bolsheviks.
The Dems think they have the second advantage judging by that "Jesusland" map and their Euro-worship, but I'm not so sure. The profs and the tech companies may vote overwhelmingly blue but that doesn't mean the left has a monopoly on knowing anything discovered after 1960 even if Moviebob pretends they do. If the relation between Blue America and Red America really was like 19th century Europe and her colonies, namely that technological and social advances are made solely by the former and radiate to the latter, they wouldn't need to run all these gay ops and the Pubs wouldn't have been in power more often than not over the past 50 years.