The 55th United States Congress convened from March 4, 1897, to March 4, 1899. It was composed of the Senate and the House of Representatives, with a total of 45 Senators and 357 Representatives. This Congress was notable for its focus on issues such as tariff reform and expansionism. During this session, the Republican Party held a majority in both chambers, with William McKinley serving as President. Key legislation included the Dingley Tariff Act, which raised tariffs on imports, and discussions surrounding the annexation of Hawaii. The 55th Congress played a significant role in shaping U.S. economic and foreign policy.