Tertium quids

Old Republicans
LeadersMorgan Lewis
John Randolph
John Taylor
Nathaniel Macon
Foundedc.1801 (1801)
Dissolvedc.1828 (1828)
Merged intoJacksonian Democrats
IdeologyAnti-corruption
Anti-expansionism
Classical liberalism
Jeffersonianism
Republicanism
National affiliationDemocratic-Republican Party

The tertium quids (usually shortened to quids) were various factions of the Democratic-Republican Party in the United States during the early 1800s, which gradually faded into political obscurity by the 1820s. Most were in Pennsylvania or New York.

In Latin, tertium quid means "a third something". Initially, quid was a disparaging term that referred to cross-party coalitions of Federalists and moderate Republicans, such as those who supported the election of Thomas McKean as governor of Pennsylvania in 1805. However, by the 1810s, the term would more famously be used to refer to the radical faction of the Democratic-Republican Party. The group, which was also called the Old Republicans, was more strongly opposed to the Federalist Party's policies than was the emerging moderate leadership of the Democratic-Republican Party.