Well the Democrats were certainly the party that dominated the South up unto the mid-60's. and that's a region with deep racist roots that is now a Republican stronghold.

But if you're camparing the mistakes of social care in creating dependencies and contributing to the slow destruction of the family in both urban slums and rural decay....   to slavery (the buying, selling, rape and murder of black person's), then you really need to read about the realities of the slave trade in America instead of cheap propaganda.