What two political parties exist when the Constitution was being written?

When the U.S. Constitution was being written in the late 18th century, the primary political factions were the Federalists and the Anti-Federalists. The Federalists supported a strong central government and the ratification of the Constitution, while the Anti-Federalists opposed it, fearing that it would undermine states' rights and individual liberties. These groups represented the early ideological divisions that would eventually evolve into the modern political party system.