John C Calhoun in 1849, sounding a heckuva lot like Tucker Carlson speaking about immigration, or Republicans talking about the relationship between the Democratic Party and voters of color. 
Full text of Calhoun's "Southern Address." history.furman.edu/~benson/docs/c…
This is also one place where we see Southerners making the argument, in 1849, that chattel slavery was the "cornerstone" of the American Constitutional order. Not a sidelight, but the absolute centerpiece of it.
And they are, in the very first paragraph, stating right up front that the source of the tensions between North and South that are tearing the nation apart have entirely to do with race and slavery.
