The 57th United States Congress convened from March 4, 1901, to March 4, 1903. It consisted of the Senate and the House of Representatives, with a total of 45 Senators and 357 Representatives. This Congress was notable for addressing issues related to the Philippine-American War and the expansion of American influence overseas. During this period, the Republican Party held a majority in both chambers, with William McKinley serving as President until his assassination in September 1901. Following his death, Theodore Roosevelt became President and continued to push for progressive reforms and policies during the latter part of the Congress.