they were wiling to accept it where it already existed but opposed further expansion
Most Northerner didn't care for slavery. That is not to say they didn't want it abolished, it just did not affect their life.
Some northerners believed slavery was morally wrong. Southerners believed slavery was an essential part of their lives.
Federalists
It was seen as a ploy to expand slavery into the West. This was not the express purpose of the treaty, but a letter by John C. Calhoun written in support of the treaty stated that slavery was beneficial. Because this was used as support for the treaty, anti-slavery Northerners did not pass the law. Sectional conflict was also feared.
Northerners rejected John Crittenden's compromise because it proposed the extension of the Missouri Compromise line, allowing slavery in territories north of the line, which contradicted their anti-slavery stance. Southerners, while initially supportive, ultimately opposed it due to fears that it did not go far enough in protecting slavery in all territories. The growing sectional tensions and the belief that compromises were inadequate to address the moral and political divisions over slavery led both sides to reject the proposal.
Some states passed personal liberty laws for runaway slaves.
Most Northerner didn't care for slavery. That is not to say they didn't want it abolished, it just did not affect their life.
Most Northerners were opposed to slavery, viewing it as a moral injustice and advocating for its abolition. This opposition to slavery became a key factor in the growing tensions between the North and South that ultimately led to the American Civil War.
The election of these two men likely upset Northerners due to their pro-slavery stance and policies that favored the South, which threatened the balance of power between free and slave states. Additionally, their election signaled a potential expansion of slavery into new territories, intensifying sectional tensions. Northerners, who were increasingly anti-slavery, felt marginalized and alarmed by the prospect of a federal government that supported and legitimized the institution of slavery. This discontent contributed to the rising divisions that eventually led to the Civil War.
Some northerners believed slavery was morally wrong. Southerners believed slavery was an essential part of their lives.
Northerners were completely against slavery, and before the Civil War they took their hatred overboard by killing Southerners for their slavery.
no.
Many Northerners were for the proclamation that ended slavery. However, there were Northerners who felt like Southerners and opposed it.
many northerners learned about slavery by personal contact with slaves.
Federalists
It was seen as a ploy to expand slavery into the West. This was not the express purpose of the treaty, but a letter by John C. Calhoun written in support of the treaty stated that slavery was beneficial. Because this was used as support for the treaty, anti-slavery Northerners did not pass the law. Sectional conflict was also feared.
Northerners disliked the Fugitive Slave Law of 1850 because it mandated that citizens assist in the capture of escaped slaves and imposed severe penalties on those who helped them. This law compelled free states to participate in the enforcement of slavery, which many Northerners found morally objectionable. Additionally, it threatened the safety of free Black individuals, who could be wrongfully captured and enslaved. The law intensified sectional tensions and fueled anti-slavery sentiment in the North.