“The final irony is that the vast majority of blacks have turned against the party of emancipation and individual responsibility and now support the party of slavery, segregation and Jim Crow laws that now imposes dependency and racist quotas. The same Democratic Party that tells them they cannot succeed on their own. The Party that tells them they are not good enough to intellectually compete with whites. And now we have a black candidate spewing the same vile line so that he can become the head overseer. This is the party that tells blacks they need the Democrats as a crutch: the same party that says it is not racist. Perhaps Jefferson Davis did get the last laugh after all. Did he not think that blacks were so inferior to whites that they could not be trusted to look to their own affairs? That without the slave-supporting Democratic Party the black man would be lost and helpless in a world he lacked the intelligence to barely comprehend.”

2010s, Slavery, secession, segregation, and socialism (2010)

Source: 2000s, Wrong on Race: The Democratic Party's Buried Past (2008), p. xiii

Source: 2000s, Wrong on Race: The Democratic Party's Buried Past (2008), p. xiv

Speech to the Virginia Convention (1861)
Context: These are pregnant statements; they avow a sentiment, a political principle of action, a sentiment of hatred to slavery as extreme as hatred can exist. The political principle here avowed is, that his action against slavery is not to be restrained by the Constitution of the United States, as interpreted by the Supreme Court of the United States. I say, if you can find any degree of hatred greater than that, I should like to see it. This is the sentiment of the chosen leader of the Black Republican party; and can you doubt that it is not entertained by every solitary member of that same party? You cannot, I think. He is a representative man; his sentiments are the sentiments of his party; his principles of political action are the principles of political action of his party. I say, then; it is true, at least, that the Republican party of the North hates slavery.

2000s, If Lincoln Hadn't Died (2009)

As quoted in Michael Scheuer's Non-Intervention https://archive.is/QBuxT (22 June 2015), by M. Scheuer.
2010s

1850s, The Present Aspect of the Slavery Question (1859)
Context: The country was divided between the Whig and Democratic organizations. The Democratic Party then, as now, was in open alliance with slavery, in a conspiracy against the Constitution and the peace of the country. Of that there was no hope; and when the Whig party at Baltimore with fabulous fatuity dodged the question, the great Whig party, newly painted and repaired, with all its guns burnished, its drums beating and colors flying, went down in a moment clean out of sight, like the Royal George at Spithead, and of all that stately craft there remain but a few ancient mariners drifting half-drowned in the water, and sputtering with winking eyes that the ship had better try another voyage.

2010s, Voting Democratic for the next 200 years (2014)

As quoted in Exit with Honor: The Life and Presidency of Ronald Reagan https://books.google.com/books?id=qPfqBgAAQBAJ&pg=PA64(2015) by William E Pemberton. p. 64
Post-presidency (1989–2004)