The correct answer is Federalists. This answer is based on the information provided in the question. George Washington was a prominent figure in American history and the first President of the United States. During his presidency, there were two major political factions: the Federalists and the Anti-Federalists. The Federalists, led by Alexander Hamilton and John Adams, supported a strong central government and the ratification of the Constitution. On the other hand, the Anti-Federalists, led by Thomas Jefferson and James Madison, were more concerned about states' rights and were skeptical of a strong central government. Given this context, it can be inferred that George Washington was associated with the Federalist party.