The Foraker Act, officially called the Organic Act of 1900 and most commonly known by the name of its sponsor, Senator Joseph B. Foraker, (R-Ohio), is an organic act of the 56th United States Congress that was signed into law by President William McKinley on April 12, 1900, to take effect May 1, 1900. The Act replaced the military government of Puerto Rico, which was established by the United States after the annexation of the archipelago and island during the Spanish–American War in 1898, with a civil insular government under the continued federal jurisdiction of the United States as the local administration of an unincorporated territory. It served as the primary organic law for the government of Puerto Rico and its relation with the United States until it was superseded by the Jones–Shafroth Act of 1917.