The Presidency of Theodore Roosevelt began on September 14, 1901, when Theodore Roosevelt became the 26th President of the United States upon the assassination and death of President William McKinley, and ended on March 4, 1909. In foreign affairs, Theodore Roosevelt’s legacy is judicious support of the national interest and promotion of world stability through the maintenance of a balance of power; creation or strengthening of international agencies, and resort to their use when practicable ; and implicit resolve to use military force, if feasible, to foster legitimate American interests. After the 1902 elections, Roosevelt called for a ban on railroad rebates to large industrial concerns, as well as for the creation of a Bureau of Corporations to study and report on monopolistic practices. These Republican leaders blocked the more ambitious aspects of Roosevelt's agenda, though Roosevelt won passage of a new Federal Employers Liability Act and other laws, such as a restriction of child labor in Washington, D.C.