This is the principle of letting the states decide the slavery issue for themselves.

I am the political party that served as the nucleus of the Republican Party.

I escaped slavery and eventually became an abolitionist. I wrote my own auto-biography & gave speeches in the hopes of exposing the horrors of slavery.

The ______ _______ was designed to eliminate the possibility of slavery in the land the U.S. claimed as a result of the Mexican-American War. It failed to pass and only increased Sectionalist feelings. This was authored by a Free-Soiler.

This political party was pro-westward expansion, accepting of slavery, and wanted a limited government. Prominent figures belonging to this party at the time included Andrew Jackson and James K. Polk.

I am the author of the Kansas-Nebraska Act, which only made tensions worse. I was affiliated with the Democratic Party and debated with Lincoln in 1858 when I was running for the Senate.

This Compromise had 4 key points. One of them was to make a more stringent Fugitive Slave Act, which angered the North. It was authored by Henry Clay, who was becoming increasingly frustrated with trying to come up with ways to appease the North and South.

This act temporarily lead the Southerners to accept the loss of California as a free state. However, it only drove the wedge deeper between the North and South and led to opposition to enforce it. The North saw the act as bringing slavery into their territory.

I am an escaped slave who returned 19 times to help about 300 slaves escape to freedom through the Underground Railroad.

The Kansas-Nebraska Act repealed this previous compromise that made slavery forbidden above the 36 30 line. As a result, tensions spilled over in the form of Bleeding Kansas and the Caning of Senator Sumner.

This event is remembered as pro-slavery Missouri residents crossing the border to vote for a pro-slavery government in Kansas. They won, so Free-Soilers set up their own government in Topeka, which only led to more confusion. Fighting soon broke out between the two sides.

The collapse of this political party in the 1850s mirrored the Union breaking apart. The Know-Nothing and Republican Party were born as a result, with only one becoming permanent.

The year of this election, in which James Buchana was elected president, would mark the beginning of the Republican Party winning all but four presidential elections between 1860 and 1932.

This event, prompted by the discovery of a precious element in California, eventually led the state to apply for statehood and create its own Constitution. It led to further tensions because CA would be admitted as a free state.

This person was elected president of the Confederacy. Hint: He was a senator of Mississippi.

This is known as political powers held for the state governments rather than the federal government.

Events under this president include Texas becoming a state, the Mexican-American War, and the signing of the Treaty of Guadalupe Hidalgo. He was a democrat, the 11th POTUS, and in office from 1845-1849.

This president was in office for just a brief time before dying of Gastroenteritis. He was also a general during the Mexican-American War.

This one-term Whig president, serving from 1850-1853, signed the Compromise of 1850 into law.

This Democratic president signed the Kansas-Nebraska bill into law. He was in office from 1853-1857, when the Underground Railroad was becoming more prominent and when Bleeding Kansas occurred.

This democratic president, holding office from 1857-1861, has the Lincoln-Douglas Debates, the Dred Scott v Sandord case, and South Carolina secession as events happening under his presidency.