The Democratic Party is one of the two major political parties of the United States political system and the oldest active political party in the country. Founded in 1828, the Democratic Party is the oldest active voter-based political party in the world. The party has changed significantly during its nearly two centuries of existence. Once known as the party of the "common man", the early Democratic Party stood for individual rights and state sovereignty, and opposed banks and high tariffs. In the first decades of its existence, from 1832 to the mid-1850s (known as the Second Party System), under Presidents Andrew Jackson, Martin Van Buren, and James K. Polk, the Democrats usually defeated the opposition Whig Party by narrow margins.
Before the American Civil War, the party generally supported slavery or insisted it be left to the states. After the war until the 1940s, the party opposed civil rights reforms in order to retain the support of Southern white voters. The Republican Party was organized in the mid-1850s from the ruins of the Whig Party and Free Soil Democrats. It was dominant in presidential politics from 1860 to 1928. The Democrats elected only two Presidents during this period: Grover Cleveland (in 1884 and 1892) and Woodrow Wilson (in 1912 and 1916). Over the same period, the Democrats proved more competitive with the Republicans in Congressional politics, enjoying House of Representatives majorities (as in the 65th Congress) in 15 of the 36 Congresses elected owing largely to their dominance of the Solid South, although only in five of these they formed the majority in the Senate. Furthermore, the Democratic Party was split between the Bourbon Democrats, representing Eastern business interests, and the agrarian party elements representing poor farmers in the South and West. After the Republican landslide in the 1894 House elections, the agrarian element, marching behind the slogan of free silver (i.e. in favor of inflation), captured the party. They nominated William Jennings Bryan in the 1896, 1900, and 1908 presidential elections, although he lost every time. Both Bryan and Wilson were leaders of the progressive movement in the United States (1890s–1920s) and opposed imperialistic expansion abroad while sponsoring liberal reforms at home despite supporting racism and discrimination against blacks in government offices and elsewhere.