This says otherwise.
https://www.goodreads.com/book/show/10759726-lincoln-s-marxists
Also if you read about the 48er scum we took in from Germany, they were overwhelmingly hardcore Leftists. They 100% backed Lincoln.
Has it ever occurred to you that Karl Marx’s “praise” for Lincoln may have just been PR for Marx’s communist followers? It’s like Lenin’s defense of free speech while fighting the Czar yet revoking it once he was in power. Either way, the fact that Marx and Engels in their private correspondences outright MOCKED Lincoln would suggest they didn’t actually support him other than a cynical PR move.
As far as the 48ers, even if they did, their plans backfired big time, especially when it became apparent that Lincoln had NO intention of backing Marx’s ideas (the only Republican founder who did back him was Horace Greeley, and he eventually ended up evicted from his own party).