United States foreign policy in the Caribbean and Central America. Previous administrations had made efforts to promote American business interests overseas, but Taft went a step further and used the web of American diplomats and consuls abroad to further trade. Such ties, Taft hoped, would promote world peace. Taft pushed for arbitration treaties with Great Britain and France, but the Senate was not willing to yield to arbitrators its constitutional prerogative to approve treaties. Tariffs and reciprocity At the time of Taft's presidency, protectionism through the use of tariffs was a fundamental position of the Republican Party. The Dingley Tariff had been enacted to protect American industry from foreign competition. The 1908 party platform had supported unspecified revisions to the Dingley Act, and Taft interpreted this to mean reductions. Taft called a special session of Congress to convene on March 15, 1909 to deal with the tariff question. Sereno E. Payne, chairman of the House Ways and Means Committee, had held hearings in late 1908, and sponsored the resulting draft legislation. On balance, the bill reduced tariffs slightly, but when it passed the House in April 1909 and reached the Senate, the chairman of the Senate Finance Committee, Rhode Island Senator Nelson W. Aldrich, attached many amendments raising rates. This outraged progressives such as Wisconsin's Robert M. La Follette, who urged Taft to say that the bill was not in accord with the party platform. Taft refused, angering them. Taft insisted that most imports from the Philippines be free of duty, and according to Anderson, showed effective leadership on a subject he was knowledgeable on and cared about. When opponents sought to modify the tariff bill to allow for an income tax, Taft opposed it on the ground that the Supreme Court would likely strike it down as unconstitutional, as it had before. Instead, they proposed a constitutional amendment, which passed both houses in early July, was sent to the states, and by 1913 was ratified as the Sixteenth Amendment. In the conference committee, Taft won some victories, such as limiting the tax on lumber. The conference report passed both houses, and Taft signed it on August 6, 1909. The Payne-Aldrich tariff was immediately controversial. According to Coletta, "Taft had lost the initiative, and the wounds inflicted in the acrid tariff debate never healed". In Taft's annual message sent to Congress in December 1910, he urged a free trade accord