James Buchanan in the context of "1852 Democratic National Convention"

A United States presidential election was held on November 6, 1860. The Republican Party ticket of Abraham Lincoln and Hannibal Hamlin emerged victorious.

In 1860, the United States was divided over the issue of slavery. Four major political parties nominated candidates in the 1860 presidential election. Incumbent president James Buchanan, a Democrat, did not seek re-election. The anti-slavery Republican Party nominated Abraham Lincoln, a former one-term Whig Representative from Illinois, for president. Its platform promised not to interfere with slavery in the South, but opposed extension of slavery into the territories. A group of former Whigs and Know Nothings formed the Constitutional Union Party, which sought to avoid disunion by resolving divisions over slavery with some new compromise. The 1860 Constitutional Union Convention put forward former Tennessee Senator John Bell for president. After the 1860 Democratic National Convention adjourned without agreeing on a nominee, a second convention nominated Illinois Senator Stephen A. Douglas as the Democratic presidential candidate. Douglas's support for the concept of popular sovereignty, which called for each territory's settlers to decide locally on the status of slavery, alienated many radical pro-slavery Southern Democrats. With President Buchanan's support, Southern Democrats held their own convention, nominating Vice President John C. Breckinridge of Kentucky for president.

Colorado is a landlocked state in the Western United States. It is one of the Mountain states, and Southwestern region of the United States, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas to the east, and Oklahoma to the southeast. Colorado is noted for its landscape of mountains, forests, high plains, mesas, canyons, plateaus, rivers, and desert lands. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the eighth-largest U.S. state by area and the 21st by population. The United States Census Bureau estimated the population of Colorado to be 5,957,493 as of July 1, 2024, a 3.2% increase from the 2020 United States census.

The region has been inhabited by Native Americans and their Paleo-Indian ancestors for at least 13,500 years and possibly much longer. The eastern edge of the Rocky Mountains was a major migration route for early peoples who spread throughout the Americas. In 1848, much of the Nuevo México region was annexed to the United States with the Treaty of Guadalupe Hidalgo. The Pike's Peak Gold Rush of 1858–1862 created an influx of settlers. On February 28, 1861, U.S. President James Buchanan signed an act creating the Territory of Colorado, and on August 1, 1876, President Ulysses S. Grant signed Proclamation 230, admitting Colorado to the Union as the 38th state. The Spanish adjective "colorado" means "colored red" or "ruddy". Colorado is nicknamed the "Centennial State" because it became a state 100 years (and four weeks) after the signing of the United States Declaration of Independence.

The Battle of Fort Sumter (also the Attack on Fort Sumter or the Fall of Fort Sumter) (April 12–13, 1861) was the bombardment of Fort Sumter near Charleston, South Carolina, by the South Carolina militia. It ended with the surrender of the fort by the United States Army, beginning the American Civil War.

Following the declaration of secession by South Carolina on December 20, 1860, its authorities demanded that the U.S. Army abandon its facilities in Charleston Harbor. On December 26, Major Robert Anderson of the U.S. Army surreptitiously moved his small command from the vulnerable Fort Moultrie on Sullivan's Island to Fort Sumter, a substantial fortress built on an island controlling the entrance of Charleston Harbor. An attempt by U.S. President James Buchanan to reinforce and resupply Anderson using the unarmed merchant ship Star of the West failed when it was fired upon by shore batteries on January 9, 1861. The ship was hit three times, which caused no major damage but nonetheless kept the supplies from reaching Anderson.

John Cabell Breckinridge (January 16, 1821 – May 17, 1875) was an American politician who served as the 14th vice president of the United States, with President James Buchanan, from 1857 to 1861. Assuming office at the age of 36, Breckinridge is the youngest vice president in U.S. history. He was also the Southern Democratic candidate in the 1860 presidential election, losing to antislavery Republican candidate Abraham Lincoln.

Breckinridge was born near Lexington, Kentucky, to a prominent local family. After serving as a noncombatant during the Mexican–American War, he was elected as a Democrat to the Kentucky House of Representatives in 1849, where he took a pro-slavery stance. Elected to the U.S. House of Representatives in 1851, he allied with Stephen A. Douglas in support of the Kansas–Nebraska Act. After reapportionment in 1854 made his re-election unlikely, he declined to run for another term. He was nominated for vice president at the 1856 Democratic National Convention to balance a ticket headed by James Buchanan. The Democrats won the election, but Breckinridge had little influence with Buchanan, and as presiding officer of the Senate, could not express his opinions in debates. He joined Buchanan in supporting the proslavery Lecompton Constitution for Kansas, which led to a split in the Democratic Party. In 1859, he was elected to succeed Senator John J. Crittenden at the end of Crittenden's term in 1861.

Lewis Cass (October 9, 1782 – June 17, 1866) was a United States Army officer and politician. He represented Michigan in the United States Senate and served in the Cabinets of two U.S. Presidents, Andrew Jackson and James Buchanan. He was also the 1848 Democratic presidential nominee. A slave owner himself, he was a leading spokesman for the doctrine of popular sovereignty, which at the time held the idea that people in each U.S state should have the right to decide whether to permit slavery as a matter of states' rights.

Born in Exeter, New Hampshire, he attended Phillips Exeter Academy before establishing a legal practice in Zanesville, Ohio. After serving in the Ohio House of Representatives, he was appointed as a U.S. Marshal. Cass also joined the Freemasons and eventually co-founded the Grand Lodge of Michigan. He fought at the Battle of the Thames in the War of 1812 and was appointed to govern Michigan Territory in 1813. He negotiated treaties with American tribes to open land for American settlement as part of a belief in "manifest destiny" and led a survey expedition into the northwest part of the territory.

The 1848 Democratic National Convention was a presidential nominating convention that met from Monday May 22 to Friday May 26 in Baltimore, Maryland. It was held to nominate the Democratic Party's candidates for President and Vice president in the 1848 election. The convention selected Senator Lewis Cass of Michigan for President and former Representative William O. Butler of Kentucky for Vice President.

As incumbent Democratic President James K. Polk declined to seek re-election, the Democratic Party nominated a new presidential candidate for the 1848 election. The major competitors for the presidential nomination were Cass, Secretary of State James Buchanan of Pennsylvania, and Supreme Court Justice Levi Woodbury of New Hampshire. Cass led on the first presidential ballot, and he continued to gain delegates until he clinched the nomination on the fourth ballot. Butler won the vice presidential nomination on the second ballot, defeating former Governor John A. Quitman of Mississippi and several other candidates. The Democratic ticket was defeated in the 1848 election by the Whig ticket of Zachary Taylor and Millard Fillmore.

Major-General John Charles Frémont (January 21, 1813 – July 13, 1890) was a United States Army officer, explorer, and politician. He was a United States senator from California and was the first Republican nominee for president of the U.S. in 1856 and founder of the California Republican Party upon being nominated. Frémont lost the election to Democrat James Buchanan.

A native of Georgia, he attended the College of Charleston for two years until he was expelled after irregular attendance. In the 1840s, Frémont led five expeditions into the western states. During this time, he directed several massacres of the indigenous peoples in California as part of the California genocide. During the Mexican–American War, he was a major in the United States Army and took control of a portion of California north of San Francisco from the short-lived California Republic in 1846. Frémont was court-martialed and convicted of mutiny and insubordination after a conflict over who was the rightful military governor of California. His sentence was commuted, and he was reinstated by President James K. Polk, but Frémont resigned from the Army. Afterwards, he settled in California at Monterey while buying cheap land in the Sierra foothills. Gold was found on his Mariposa ranch, and Frémont became a wealthy man during the California Gold Rush. He became one of the first two U.S. senators elected from the new state of California in 1850.

The Colorado Organic Act was enacted in Colorado Territory in 1861. It passed by Congress and signed by President James Buchanan on February 28, 1861, and established four-year terms for Governor, Secretary and Legislative Assembly of the territory and defined their duties. Provisions were made for delegates to the United States Congress, county and township officials, schools, courts, census-taking, and elections. Eligibility for voting was stipulated as white male residents over the age of 21. It preserved the rights of Native Americans. The bill was reported from the Senate Committee on Territories by Sen. Green (D-MO) on April 3, 1860. It was amended in 1863 and 1867, and revised in 1867, primarily focusing on legal rights and procedures.

It was created as the free Territory of Colorado. The new territory is created from the Former unorganized territory previously part of the Territory of Kansas, the northern portion of the Territory of New Mexico, the eastern portion of the Territory of Utah, and the southwestern portion of the Territory of Nebraska. The new name is chosen because the Colorado River is thought to originate somewhere in the territory. The boundaries of the Colorado Territory are essentially the same as the present State of Colorado.