Careful about your categorical thinking there, FRiend.
Ohio and Illinois were in the vanguard of black codes before and after the Civil War. In the 1890's, Cincinnati had some codes and racial covenants that forbade blacks to own property outside a small, crowded, unhealthful area near the old downtown, near the river.
Antebellum Illinoisans enforced their black code by jailing offending blacks who entered Illinois (that was the offense) by "selling them South". Neat, huh? Get rid of the problem and someone else pays you for handling it.
And when the Klan marched in the 1920's -- under the flag of the United States, by the way -- it was Catholic Democrats who opposed them with practical measures.
That statement in no way implies that no Republicans have been racists and no Democrats for equality. My point is that the present day racism in the Democrat party has just gone underground and taken a different twist. In order to get the black vote, they have enacted policies that have destroyed the black family, murdered millions of unborn black babies, enacted AA ("the soft bigotry of low expectations") and in general tried to enslave African-Americans by enticing them into their racist policies.
btw, your points seem to be more about north/south than Republican/Democrat, and I made no reference to that geographical difference. Steven Douglas was from Illinois as well as Abe Lincoln.
As an aside, in his research for his acclaimed three volume biography of LBJ, with a fourth to come in 2012, Robert Caro discovered a tape of LBJ talking to his friend Richard Russell (D Ga) after signing the 1964 Civil Rights Act, an act that the Democrats could not pass on their own but got significant Republican help. LBJ said, “That will keep the niggers voting Democrat for 200 years.” He seems to have been right.
As with most Democrat actions, it was more about cementing a voting block than any concern for blacks.