For context, this is from the trailer from the Divided States of America spin-off miniseries (from the Kaiserreich universe from Hearts of Iron mods). It casts the Combined Syndicates of America (the socialist faction in the civil war) in a mostly negative light because something something warcrimes something something revolution is bad.
Socialist movements in the USA already did use Lincoln in their imagery, often simultaneously with people like Lenin.
I mean Marx DID write to him.
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Remember the Abraham Lincoln Brigades folks
Kinda like how FDR is used as an example by socialists even though he absolutely was not a socialist.