I'll have to watch this. HAVE to.
I have done extensive study not only of the Civil War but of the 30 years preceding it and the 30 following it. There is no question that you are correct, the Democrats were the party of Slavery and White Supremacy and the architects of Jim Crow, which I consider one of the three most serious blots on our history. With slavery and the genocide of the Native Americans. Seems the only thing the Dems and Reps could agree on in the years leading up to the Civil War and immediately after was "The only good Indian is a dead Indian".
One obvious difference between Lincoln and Trump. Lincoln was scrupulously honest in his business dealings, often to the point of ridiculous. Trump is not.