Greatly concerned about the growing partisanship within the government and the detrimental impact political parties could have on the fragile unity of the nation, Washington struggled throughout his eight-year presidency to hold rival factions together. He was, and remains, the only U.S. president never to be affiliated with a political party. Despite his efforts, debates over Hamilton's economic policy, the French Revolution, and the Jay Treaty deepened ideological divisions. Those that supported Hamilton formed the Federalist Party, while his opponents coalesced around Secretary of State Thomas Jefferson and formed the Democratic-Republican Party. While criticized for furthering the partisanship he sought to avoid by identifying himself with Hamilton, Washington is nonetheless considered by scholars and political historians as one of the greatest presidents in American history, usually ranking in the top three with Abraham Lincoln and Franklin D. Roosevelt.