The 51st United States Congress convened from March 4, 1889, to March 4, 1891. It consisted of the Senate and the House of Representatives, with the Republican Party holding a majority in both chambers. This Congress was notable for the passage of significant legislation, including the McKinley Tariff and the Sherman Antitrust Act. During this session, key figures included President Benjamin Harrison, who played a crucial role in advancing his administration's agenda. The 51st Congress also addressed issues such as civil service reform and Indian affairs, reflecting the political climate of the late 19th century.