Democratic Party (United States)
Every four years the party holds a National Convention where they agree on their candidate for president.  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 16 Democratic presidents (17 if including John Tyler, who, though originally elected to the Vice Presidency as a Whig, was expelled from his party shortly after taking office, became an independent, and allied with Democrats), 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.