The Democratic National Committee coordinates most of the activities of the Democratic Party in all 50 United States. Since Andrew Jackson 's inauguration in 1829, there have been 17 Democratic presidents, the most recent (and current) being former Vice President Joseph R. Biden Jr. (D-DE) who took office as President of the United States in 2021.
Since the 1930s, a critical component of the Democratic Party coalition has been organized labor. Labor unions supply a great deal of the money, grassroots political organization, and voting base of support for the party. Union membership in the United States has declined from an all-time high in 1954 of 35% to a low of 11% in 2015.
The National Republicans in turn eventually formed part of the Whig Party, which was the second major party in the United States between the 1830s and the early 1850s. The diverse and changing nature of the Democratic-Republican Party allowed both major parties to claim that they stood for Jeffersonian principles.
When James Monroe was elected President of the United States, the Federalists died out. There was an "Era of Good Feelings" of one-party rule by the Democratic-Republicans. In the United States presidential election, 1824, four different men ran for President, all as Democratic-Republicans. John Quincy Adams was elected.