Tenement I think that's the answer
President Eisenhower provided support to see that the Supreme Court's ruling was enforced.
For instance, after the Brown vs. the Board of Education decision in 1954, many schools were reluctant to comply with the ruling. In Little Rock, Arkansas, Little Rock Central High School was still segregated in 1957 when a number of black students enrolled in the school - the "Little Rock Nine" as they became known. The governor of Arkansas called out the state guard to prevent the students from attending the high school, but President Eisenhower called deployed federal troops in opposition to the governor to protect those students as they attended the school.
Answer:
The first reason is that most of the South had broken off the rest of the Union, and did not view Abraham Lincoln as a valid authority figure.
The second reason is that slaves were an essential part to the Southern economy due to the many plantations all over the South. It was cheaper to pay a price once and get a slave that did unlimited work than it was to pay someone to do it every single time.
