Obviously a Horrible Compromise from a modern perspective, but at the time I probably would have supported it to avoid a civil war.
Horrible Compromise. To the great irony of it's authors it probably made the American Civil War more of an inevitability than it was before. As well it only seemed to encourage slavery advocates to promote more western expansion with the sole intent of getting more pro-slavery votes in congress, even going to war with Mexico to do it.
I'm not sure about that. Keep in mind that the slavery issue only really started to heat up after the MO Compromise was repealed. Frankly, I don't think there was a viable long-term solution to the slavery issue that avoids the Civil War.