Hughes was nominated for his work as Secretary of State during Warren Harding's presidency. The latter initiated the Washington Conference on Limitation of Armaments, over which Hughes presided. The treaties on disarmament at sea adopted by the conference were later ratified by the US Congress. In 1923 Hughes initiated a policy that led to the Dawes Commission, and he advocated US entry to the Permanent International Court of Arbitration. Hughes was president of the "American Bar Association" and he had been member of the US Supreme Court (1910-1916).