Mann-Elkins Act, 1910: The Mann-Elkins Act further extended the regulatory ability of the ICC. It allowed them to regulate cable and wireless companies dealing with telephone and telegraph lines. The ICC was also given greater rate-setting power as well as the ability to begin court proceedings against companies disputing the new rates.
Northern Securities Co. case: This was the first company Roosevelt filed suit against in his trustbusting stage. It was a large holding company formed by railroad and banking interests. In 1902 Roosevelt "trustbusted" them by claiming they violated the Sherman Anti-Trust Act in holding money against the public good. The company was dissolved.