American President William Howard Taft (1909–1913) was a major advocate of arbitration as a major reform of the Progressive Era. In 1911 Taft and his Secretary of State Philander C. Knox negotiated major treaties with Great Britain and with France providing that differences be arbitrated. Disputes had to be submitted to the Hague Court or other tribunal. These were signed in August 1911 but had to be ratified by a two thirds vote of the Senate. Neither Taft nor Knox consulted with members of the Senate during the negotiating process. By then many Republicans were opposed to Taft, and the president felt that lobbying too hard for the treaties might cause their defeat. He made some speeches supporting the treaties in October, but the Senate added amendments Taft could not accept, killing the agreements.