Tensions between the north and south were rising and the controversy about over whether the Missouri was going to enter as a slave state was in need of a solution. The House of Representatives decided that no more slaves should be brought into the state and the children born to slaves will be provided the emancipation. If Missouri would be admitted as a first free state it would disturb the balance of the 11 free and slave states. But thought the overall concern had to do with a political and economic balance a group of anti-slavery agitators in the north raised an outcry against the evils of slavery. Even with their protesting Missouri was admitted as a slave state. But with the help of Henry clay that played a big role in the Missouri Compromise a solution balanced out the free and slave states. Maine was admitted as a free state. The north also won in the aspect that slavery was prohibited in the Louisiana Purchase north of the line of 36-30". .
After Henry Clay, U.S. senator from Kentucky found a solution to fiery debate over the spread over slavery with his Missouri Compromise. Now, twenty six years later, the matter surfaced again within the Mexican War. Once the war was over in 1848 the issue of slavery was right back where it started. Abolitionists assailed the Mexican conflict as one provoked by the southern "slavocracy" for its own evil purposes. Some of these abolitionists included James Russell Lowell he explained this issue as having to do with proximity rather than conspiracy. David Wilmot of Pennsylvania was also fearful of this southern "slavocracy". He believed that slavery shouldn't exist in any of the territory obtained from Mexico. Even Famous philosopher Ralph Waldo Emerson said "Mexico will poison us". Another argument was given by John C. Calhoun the great champion of the south, claiming that Mexico would "subject our institution to political death.".
The Missouri Compromise and the Mexican War both dealt with the controversy of slavery.