Which was the worst state in the US during the time of slavery and segregation?

From Wikipedia: Slavery in the United States had its origins with the first English colonization of North America in Virginia in 1607 and lasted as a legal institution until the passage of the Thirteenth Amendment to the United States Constitution in 1865. From 1654 until 1865, slavery for life was legal within the boundaries of much of the present United States. Most slaves were black and were held by whites, although some Native Americans and free blacks also held slaves; there were a small number of white slaves as well. The majority of slaveholding was in the southern United States where most slaves were engaged in an efficient machine-like gang system of agriculture, with farms of fifteen or more slaves featuring a higher factor of productivity compared to those farms without slaves.

Racial segregation in the United States, as a general term, included the racial segregation of facilities, services, and opportunities such as housing, medical care, education, employment, and transportation along racial lines. The expression refers primarily to the legally or socially enforced separation of African Americans from other races, but can more loosely refer to voluntary separation, and also to separation of other racial or ethnic minorities from the majority mainstream society and communities.

http://en.wikipedia.org/wiki/Racial_segregation_in_the_United_States