"Beginning in about 1796, two political parties emerged to dominate American politics and many Americans aligned with one or the other. Some founding fathers feared this possibility and warned of the danger of factions.
Political parties are not mentioned in the Constitution. However, differences in values and how the United States government and economy should be run led to internal division and the eventual separation into the first two major parties.
These two parties were the Federalists and Democratic Republicans."
Roughly speaking, the Federalists/Whigs (Washington) then, became todays Republicans; and the Democratic Republicans (Jefferson) became todays Democrats .
*BOTH OF THESE MAJOR POLITICAL PARTIES OWNED SLAVES
Source:
https://www.studentsofhistory.com/federalists-republicans
