The 1880 Democratic National Convention was held June 22 to 24, 1880, at the Music Hall in Cincinnati, Ohio, and nominated Winfield S. Hancock of Pennsylvania for president and William H. English of Indiana for vice president in the United States presidential election of 1880.

Six men were officially candidates for nomination at the convention, and several more also received votes. Of these, the two leading candidates were Hancock and Thomas F. Bayard of Delaware. Not officially a candidate, but wielding a heavy influence over the convention, was the Democratic nominee from 1876, Samuel J. Tilden of New York. Many Democrats believed Tilden to have been unjustly deprived of the presidency in 1876 and hoped to rally around him in the 1880 campaign. Tilden, however, was ambiguous about his willingness to participate in another campaign, leading some delegates to defect to other candidates, while others stayed loyal to their old standard-bearer.

As the convention opened, some delegates favored Bayard, a conservative Senator, and some others supported Hancock, a career soldier and Civil War hero. Still others flocked to men they saw as surrogates for Tilden, including Henry B. Payne of Ohio, an attorney and former representative, and Samuel J. Randall of Pennsylvania, the Speaker of the United States House of Representatives. The first round of balloting was inconclusive. Before the second round, Tilden's withdrawal from the campaign became known for certain and delegates flocked to Hancock, who was nominated. English, a conservative politician from a swing state, was nominated for vice president. Hancock and English were narrowly defeated in the race against Republicans James A. Garfield and Chester A. Arthur that autumn.

Issues and candidates In 1876, Republican Rutherford B. Hayes of Ohio defeated Democrat Samuel J. Tilden of New York in the most hotly contested election to that time in the nation's history. The results initially indicated a Democratic victory, but the electoral votes of several states were ardently disputed until mere days before the new president was to be inaugurated. Members of both parties in Congress agreed to convene a bi-partisan Electoral Commission, which ultimately decided the race for Hayes. Most Democrats believed Tilden had been robbed of the presidency, and he became the leading candidate for nomination in 1880. In the meantime, issues of tariff reform and the gold standard divided the country and the major parties.

The monetary issue played a large role in selecting the nominees in 1880, but had little effect on the general election campaign. The debate concerned the basis for the United States dollar's value. Nothing but gold and silver coin had ever been legal tender in the United States until the Civil War, when the mounting costs of the war forced Congress to issue "greenbacks" (dollar bills backed by government bonds). They paid for the war, but resulted in the most severe inflation seen since the American Revolution. After the war, bondholders and other creditors (especially in the North) wanted to return to a gold standard. At the same time, debtors (often in the South and West) benefited by the way inflation reduced their debts, and workers and some businessmen liked the way inflation made for easy credit. The issue cut across parties, producing dissension among Republicans and Democrats alike and spawning a third party, the Greenback Party, in 1876, when both major parties nominated hard money men. Monetary debate intensified as Congress effectively demonetized silver in 1873 and began redeeming greenbacks in gold by 1879, while limiting their circulation. By the 1880 convention, the nation's money was backed by gold alone, but the issue was far from settled.

Debate over tariffs would come to play a much larger role in the campaign. During the Civil War, Congress raised protective tariffs to new heights. This was done partly to pay for the war, but partly because high tariffs were popular in the North. A high tariff meant that foreign goods were more expensive, which made it easier for American businesses to sell goods domestically. Republicans supported high tariffs as a way to protect American jobs and increase prosperity. Democrats, generally, saw them as making goods unnecessarily expensive and adding to the growing federal revenues when, with the end of the Civil War, that much revenue was no longer needed. Many Northern Democrats supported high tariffs, however, for the same economic reasons that their Republican neighbors did, so while Democratic platforms called for a tariff "for revenue only," their speakers avoided the question as much as possible.

Tilden

Samuel Jones Tilden began his political career in the "Barnburner," or Free Soil, faction of the New York Democratic Party. He was a successful lawyer and had accumulated a considerable fortune. A disciple of former president Martin Van Buren, Tilden was first elected to the New York State Assembly in 1846. Tilden defected with Van Buren to the 1848 Free Soil Party convention before returning to the Democratic party after the election. Unlike many free-soil Democrats, Tilden stayed with his party in the 1850s instead of transferring his allegiance to the newly formed Republican party. When the Civil War began, he remained loyal to the Union and considered himself a War Democrat. In 1866, he became chairman of the New York State Democratic party, a post he held for eight years. Tilden initially cooperated with Tammany Hall, the New York City political machine of William "Boss" Tweed, but the two men soon became enemies. In the early 1870s, as reports of Tammany's corruption spread, Tilden took up the cause of reform. He formed a rival faction that captured control of the party and led the effort to uncover proof of Tammany's corruption and remove its men from office. Tweed was soon indicted and convicted; Tammany was weakened and reformed, but not vanquished.

The triumph over Tammany paved the way for Tilden's election to a two-year term as governor in 1874. As a popular, reformist governor of a large swing state, Tilden was a natural candidate for the presidency in 1876, when one of the main issues was the corruption of the administration of President Ulysses S. Grant. He was nominated on the second ballot, and campaigned on a platform of reform and sound money (i.e. the gold standard). His opponent was Governor Rutherford B. Hayes of Ohio, likewise noted for his honesty and hard-money views. After the closely contested election, with the question still unresolved, Congress and President Grant agreed to submit the dispute to a bipartisan Electoral Commission, which would determine the fate of the disputed electoral votes. Tilden opposed the idea, but many Democrats supported it as the only way to avoid a second Civil War. The commission voted 8–7 to award Hayes the disputed votes. Congressional Democrats acquiesced in Hayes's election, but at a price: the new Republican president withdrew federal troops from Southern capitals after his inauguration. Tilden was defeated—robbed, in his opinion and that of his supporters.

Tilden spent the next four years as the presumptive Democratic candidate in 1880. In 1879, he declined to run for another term as governor and focused instead on building support for the 1880 presidential nomination. He considered many of his former friends (including Senator Thomas F. Bayard of Delaware) enemies now for their support of the Electoral Commission, and sought to keep the "fraud of '76" in the spotlight and burnish his own future candidacy by having his congressional allies investigate the events of the post-election maneuvering. For ten months beginning in May 1878, the Potter Committee, chaired by Democratic Congressman Clarkson Nott Potter of New York, investigated allegations of fraud and corruption in the states which had contested electoral votes in 1876. Rather than produce conclusive evidence of Republican malfeasance, as Tilden's supporters hoped, the committee exonerated Tilden of wrongdoing, but uncovered conflicting evidence that showed state election officials of both parties in an unfavorable light. This, and Tilden's declining health, made many Democrats question his candidacy. Even so, Tilden's presumed ability to carry New York, combined with his political organization and personal fortune, made him a serious contender.

The first of these qualifications was shattered with the Republican victory in the New York gubernatorial election in 1879. In that election, a revitalized Tammany split from the regular Democratic party in a patronage dispute with Tilden's faction (now known as the "Irving Hall Democrats"). Tammany ran its new leader, "Honest" John Kelly, as an independent candidate for governor, allowing the Republicans to carry the state with a plurality of the vote. Tilden began to waver, issuing ambiguous statements about whether he would run again. Rumors circulated wildly in the months before the convention, with no definitive word from Tilden. As the New York delegation left for the national convention in Cincinnati, Tilden gave a letter to one of his chief supporters, Daniel Manning, suggesting that his health might force him to decline the nomination. Tilden hoped to be nominated, but only if he was the unanimous choice of the convention; if not, Manning was entrusted to make the contents of Tilden's letter available to the New York delegation. When it became clear that the nomination would be contested, Manning revealed the contents of the Tilden letter; it was vague and inconclusive, but once its contents became known to Tilden's home state delegates, they chose to interpret it as a withdrawal. The New York delegation now considered Tilden's candidacy to be ended, and sought a new standard-bearer.

Bayard

One beneficiary of Tilden's departure from the scene was Senator Thomas F. Bayard of Delaware. Bayard was the scion of an old political family in Delaware and had represented his state in the United States Senate since 1869. As one of a relative handful of conservative Democrats in the Senate at the time, Bayard began his career opposing vigorously, if ineffectively, the Republican majority's plans for the Reconstruction of the Southern states after the Civil War. Like Tilden, Bayard supported the gold standard and had a reputation for honesty. At the 1876 convention, Bayard had placed a distant fifth in the balloting, but supported Tilden's cause in the general election, speaking on his behalf around the country. The political friendship between the two quickly soured in the election's aftermath as Bayard supported the Electoral Commission and Tilden opposed it. Bayard believed the commission was the only alternative to civil war, and served as one of the Democratic members; Tilden took this as a personal betrayal.