It seems very similar to Trotsky's transitional program. However the resources I've found online explaining it have been few and short, so I'm still confused how mass line actually works in practice. It seems like a fantastic tactic for the left to deploy right now, but I haven't found any resources that explain it in detail.
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Thanks. I'd read the theory but having it summarized by several people really helped consolidate it.
Damn this is a quality post. Thank you for taking the time to gather all those sources.