The Fifty-Eighth Congress of the United States convened from March 4, 1903, to March 4, 1905. It consisted of the Senate and the House of Representatives, with a total of 46 senators and 357 representatives. This Congress was notable for addressing issues such as the regulation of railroads and the establishment of the Department of Commerce and Labor. During this period, significant legislation included the Elkins Act, which aimed to curb railroad rebates, and the Hepburn Act, enhancing the government's ability to regulate railroad rates. The Congress also dealt with matters related to foreign policy, including the construction of the Panama Canal.