Northerners favored it because it banned slavery in the land obtained from Mexico, aka the Mexican Cession, thus making another step toward abolishing slavery. They supported this so much, that antislavery northerners created a new party, known as the Free- Soil Party, which supported the Wilmot Proviso. Southerners, however, opposed it, and wanted more land that allows slavery.
they opposed it
This question is hard to answer with just one viewpoint. In fact, in the early 1850's the idea of slavery was mixed among Northerners. For example, the clergy were sometimes in favor of slavery, as seen in "South Side view of Slavery" by Rev. Nehemiah Adams, but this was not always the case. When Harriet Beecher Stowe's book, "Uncle Tom's Cabin" was published in 1852, many northerners were outraged by the atrocities slave families had to go through. She is said to have described her book as actual events and occurrences that she had witnessed and put together in a "mosaic," as an artist would do. Her book opened the eyes of many northerners and westerners who had never experienced such things. With all this in mind, however, it cannot be said that all northerners and for that matter all southerners shared the same viewpoints. While the abolitionists, northerners who felt slavery was immoral, screamed louder than any other northerners, their ideas were not the only ones. Other northerners were afraid that such cheap labor would keep their prices uncompetitive in the market place. Therefore, it can be said that both economic and moral reasons dictated the views of the northerners in the 1850's. For the most part, however, the north did not find a need to have slaves because their population had increased over time and the labor force was extensive. While the north saw an increase in population, the south remained nearly stagnate.
It was the North because the north gained money while south lost it because they bought most of their goods from Britain, who goods had the tariffs on them.
The North was not uniform in its reaction to Brown's raid on Harper's Ferry and his punishment for it. The most vocal of those who did speak out in speeches and editorials, however, tended to favor his actions. One Abolitionist Editorial called John Brown "the most practical Abolitionist in the country." Such fiery rhetoric convinced southerners, already paranoid, that all northerners were set to free all their slaves at the first opportunity.
John Calhoun of South Carolina (the 7th Vice President of the US) was among the Southerners who resisted Northern efforts to introduce abolitionist laws in Congress. He died in 1850, just as the anti-slavery movement was growing. The Southerners wanted slavery to move to the western territories. They wanted their already booming economy to be spread into the new states. However, they reached conflict with the Northerners who were not in favor of slavery. The Kansas- Nebraska Act allowed the citizens to vote whether or not they were for slavery caused major problems. This increased tensions between the opposing states. Before Abraham Lincoln's election, the country struggled on the issue of secession. When he took office in 1861, things reached their breaking point and the first Southern states seceded.
Generally the North.
It did that. The issue could not be ducked by a Congressman. All had to vote in favor of, or opposed to slavery.
Southerners sought to extend slavery, already established in Texas. Northerners feared that annexation of more slave territory would tip the uneasy balance in the Senate in favor of slave states-and prompt war with Mexico.
Because, Texas had a debt toward the US so when they joined they wouldn't have that debt anymore. Also, Northerners objected because annexing Texas means that another slave state would be added, thus upsetting the balance of slave and free states. Southerners favored the annexations because it was in their favor.
they opposed it
In favor. They saw slaves as property and wanted their property back.
I think that mostly the Southerners were totally for slavery.
Yes. It would protect their manufacturing industry.
To reduce competition from foreign grain producers. Northern America industrialists increase the demand for American. This is for manufactured goods.
No, he stuck to his plan that he announced prior to Clay's, to admit California immediately as a free state and get New Mexico to also go immediately to enacting a constitution. He hoped to skip the contention over the Wilmot Proviso by not having them go through an interim phase where Congress passes a law establishing them as territories under the United States. Taylor was willing to lead troops himself to fight Texas over the New Mexico border, one of the issues that needed resolution.
During the American Civil War, the disadvantages of the Emancipation Proclamation of January 1863 were various. As just one example, it galvanized the passions of many Southerners, inspiring them to sacrifice even more greatly in the fight to preserve their way of life. As another example, it aroused the protest and even, in cases, the wrath of Northerners whose prejudice or focus (or both) led them to disparage the plight of the slaves. As yet another, it caused political criticism from some of Lincoln's fellow Northerners (some of whom were themselves in favor of emancipation) on the basis of such a proclamation being without any constitutional grounding.
Gettysburg was the turn of the war in the Unions favor. This showed many northerners that the war could be won. Sadly though, the Battle of Gettysburg was the bloodiest battle on our nations soil which pitted brother against brother.