Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. Telegraphy is now an obsolete form of communication and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunications cables. The first cable was laid in the 1850s from Valentia Island off the west coast of Ireland to Bay of Bulls, Trinity Bay, Newfoundland. The first communications occurred on 16 August 1858, but the line speed was poor and efforts to improve it caused the cable to fail after three weeks.

The Atlantic Telegraph Company led by Cyrus West Field constructed the first transatlantic telegraph cable. The project began in 1854 and was completed in 1858. The cable functioned for only three weeks, but was the first such project to yield practical results. The first official telegram to pass between two continents was a letter of congratulations from Queen Victoria of the United Kingdom to President of the United States James Buchanan on August 16. Signal quality declined rapidly, slowing transmission to an almost unusable speed. The cable was destroyed the following month when Wildman Whitehouse applied excessive voltage to it while trying to achieve faster operation. It has been argued that the cable's faulty manufacture, storage and handling would have caused its premature failure in any case. Its short life undermined public and investor confidence and delayed efforts to restore a connection.

The second cable was laid in 1865 with much-improved material. It was laid from the ship SS Great Eastern, built by John Scott Russell and Isambard Kingdom Brunel and skippered by Sir James Anderson. More than halfway across, the cable broke and after many rescue attempts, it was abandoned. In July 1866 a third cable was laid from The Anglo-American Cable house on the Telegraph Field, Foilhomurrum. On 13 July, Great Eastern steamed westward to Heart's Content, Newfoundland, and on July 27 the successful connection was put into service. The 1865 cable was also retrieved and spliced so two cables were in service. These cables proved more durable. Line speed was very good and the slogan "Two weeks to two minutes" was coined to emphasize the great improvement over ship-borne dispatches. The cable altered for all time personal, commercial and political relations between people across the Atlantic. Since 1866 there has been a permanent cable connection between the continents.

In the 1870s duplex and quadruplex transmission and receiving systems were set up that could relay multiple messages over the cable. Before the first transatlantic cable, communications between Europe and the Americas took place only by ship, and could be delayed for weeks by severe winter storms. By contrast, the transatlantic cable allowed a message and a response in the same day.

James Buchanan Jr. ( bew-KAN-ən; April 23, 1791 – June 1, 1868) was an American lawyer and politician who served as the 15th president of the United States from 1857 to 1861. He previously served as secretary of state from 1845 to 1849 and represented Pennsylvania in both houses of the U.S. Congress. He was an advocate for states' rights, particularly regarding slavery, and minimized the role of the federal government preceding the Civil War.

Buchanan was a prominent lawyer in Pennsylvania and won his first election to the state's House of Representatives as a Federalist. He was elected to the U.S. House of Representatives in 1820 and retained that post for five terms, aligning with Andrew Jackson's Democratic Party. Buchanan served as Jackson's minister to Russia in 1832. He won election in 1834 as a U.S. senator from Pennsylvania and continued in that position for 11 years. He was appointed to serve as President James K. Polk's secretary of state in 1845, and eight years later was named as President Franklin Pierce's minister to the United Kingdom.

Beginning in 1844, Buchanan became a regular contender for the Democratic party's presidential nomination. He was finally nominated in 1856, defeating incumbent Franklin Pierce and Senator Stephen A. Douglas at the Democratic National Convention. He benefited from the fact that he had been out of the country, as ambassador in London, and had not been involved in slavery issues. Buchanan and running mate John C. Breckinridge of Kentucky carried every slave state except Maryland, defeating anti-slavery Republican John C. Frémont and Know-Nothing former president Millard Fillmore to win the 1856 presidential election.

As President, Buchanan intervened to assure the Supreme Court's majority ruling in the pro-slavery decision in the Dred Scott case. He acceded to Southern attempts to engineer Kansas’ entry into the Union as a slave state under the Lecompton Constitution, and angered not only Republicans but also Northern Democrats. Buchanan honored his pledge to serve only one term, and supported Breckinridge's unsuccessful candidacy in the 1860 presidential election. He failed to reconcile the fractured Democratic party amid the grudge against Stephen Douglas, leading to the election of Republican and former Congressman Abraham Lincoln.

Buchanan's leadership during his lame duck period, before the American Civil War, has been widely criticized. He simultaneously angered the North by not stopping secession, and the South by not yielding to their demands. He supported the ineffective Corwin Amendment in an effort to reconcile the country. He made an unsuccessful attempt to reinforce Fort Sumter, but otherwise refrained from preparing the military. His failure to forestall the Civil War has been described as incompetency, and he spent his last years defending his reputation. In his personal life, Buchanan never married, the only U.S. president to remain a lifelong bachelor, leading some to question his sexual orientation. Buchanan died of respiratory failure in 1868, and was buried in Lancaster, Pennsylvania, where he had lived for nearly 60 years. Historians and scholars consistently rank Buchanan as one of the worst presidents in American history.