The support for reform was dwindling in the south because a reform would mean that slavery would be put to an end.
The Southerners started to withdraw their support for reforms because if the reformation goals were achieved it would mean that they would not be able to get slave labors like they used to.
The North wanted an end to Slavery but the south did not want it. The slaves were used to work on plantations. They provided cheap labor on cotton plantations, sugarcane plantations and were also used to carry out other domestic work.
A reformation would cause all of these to cease.
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