Actually it is you who refuses to learn, many people have provided links proving democrats weren't the only ones who were pro slavery or owned slaves. Of course that doesn't fit your stereotypes or the dumb game you are playing so you ignore the truth and actual truth.
Whigs owned slaves, even African Americans owned slaves, along with the Irish etc.. For one some of the first slaves entered into a Spanish colony. You have no concept of actual history. I suggest going back to school or getting your head out of your ass.
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While slavery did predate the Democratic Party (the first African slaves were brought to the Western Hemisphere by the Spanish), the Democrats were HEAVILY invested in slavery during the mid-1800's. In fact, slavery split the Democratic Party vote so completely that it's the reason Lincoln was elected.