President Polk's war with Mexico ripped open the slavery question again. Was it to be allowed in the new territories? The WILMOT PROVISO (1846), which would have excluded slavery, became a rallying point for both sides, being voted on again and again in Congress and successfully held off by southerners. Abolitionism, led by William Lloyd GARRISON and others and now strong in many northern circles, called for the immediate emancipation of slaves with no compensation to slaveowners. Most northern whites disliked blacks and did not support abolition; they did want to disallow slavery in the territories so they could be preserved for white settlement based on northern ideals: free labor, dignity of work, and economic progress.
In 1848 northerners impatient with both of the existing parties formed the FREE-SOIL PARTY. By polling 300,000 votes for their candidate, Martin Van Buren, they denied victory to the Democrats and put the Whig Zachary TAYLOR in the White House (1849-50; on his death Millard FILLMORE became president, 1850- 53). The COMPROMISE OF 1850 seemed to settle the slavery expansion issue by the principle of POPULAR SOVEREIGNTY, allowing the people who lived in the Mexican cession to decide for themselves. A strong FUGITIVE SLAVE LAW was also passed in 1850, giving new powers to slaveowners to reach into northern states to recapture escaped slaves.
THE CIVIL WAR ERA
As the 1850s began, it seemed for a time that the issue of slavery and other sectional differences between North and South might eventually be reconciled. But with the westward thrust of the American nation, all attempts at compromise were thwarted, and diverging economic, political, and philosophical interests became more apparent. The resulting civil war transformed the American nation.
Political Fragmentation
In 1854 the KANSAS-NEBRASKA ACT threw open the huge unorganized lands of the Louisiana Purchase to popular sovereignty, repealing the Missouri Compromise line of 1820. The North exploded in rage. Thousands defected from the Whig party to establish a new and much more antisouthern body (and one wholly limited to the northern states), the REPUBLICAN PARTY. The Republicans were aided by an enormous anti-Catholic outburst under way at the same time, aimed at the large wave of Irish Catholic immigration. Anti-Catholicism was already draining away Whigs to a new organization, the American party, soon known as the KNOW-NOTHING PARTY. When in 1856 it proved unable to hold together its members, north and south, because of disagreements over slavery, the anti-Catholics joined the Republicans.
In Kansas civil war broke out between pro-slavery and anti- slavery advocates, as settlers attempted to formalize their position on the institution prior to the territory's admission as a state. The Democratic presidents Franklin PIERCE (1853-57) and James BUCHANAN (1857-61) appeared to favor the pro-slavery group in Kansas despite its use of fraud and violence. In 1857 the Supreme Court, southern dominated, intensified northern alarm in its decision in the case of DRED SCOTT V. SANDFORD. The Court ruled that Congress had no authority to exclude slavery from the territories and thus, that the Missouri Compromise line had been unconstitutional all along. Thousands of northerners now became convinced that a "slave conspiracy" had infiltrated the national government and that it intended to make slavery a nationwide institution.
In 1860 the political system became completely fragmented. The Democrats split into northern and southern wings, presenting two different candidates for the presidency; the small CONSTITUTIONAL UNION PARTY attempted to rally the former Whigs behind a third. The Republicans, however, were able to secure the election of Abraham LINCOLN to the White House.
Southerners had viewed the rise of the Yankee-dominated Republican party with great alarm. They were convinced that the party was secretly controlled by abolitionists (although most northerners detested the abolitionists) and that Yankees believed in using government to enforce their moralistic crusades. In 1859, John BROWN led a raid on the federal arsenal at Harpers Ferry, Va., hoping to incite a slave insurrection. His action--and his subsequent deification by some northerners- -helped persuade southerners that emancipation of the slaves, if northerners obtained control of the country, was sooner or later inevitable.
Secession
Southern leaders had threatened to leave the Union if Lincoln won the election of 1860. Many South Carolinians, in particular, were convinced that Republican-sponsored emancipation would lead to bloody massacres as blacks sought vengeance against whites. In order to prevent this horror South Carolina seceded in December 1860, soon after the victory of Lincoln, an undeniably sectional candidate; it was optimistic about the eventual outcome of its action. Before Lincoln's inauguration (March 1861) six more states followed (Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas). In February their representatives gathered in Montgomery, Ala., to form the CONFEDERATE STATES OF AMERICA. On Apr. 12, 1861, when President Lincoln moved to reprovision the federal troops at FORT SUMTER, in Charleston Harbor, Confederate shore batteries launched a 34-hour battering of the installation, forcing its surrender. The U.S. CIVIL WAR had begun.