Why did Roosevelt go after in the northern securities company for?

President Theodore Roosevelt targeted the Northern Securities Company because he believed it violated the Sherman Antitrust Act by creating a monopoly that restricted competition in the railroad industry. The company's formation threatened to consolidate control over key railroads, which could lead to higher prices and reduced service for consumers. By pursuing legal action against Northern Securities, Roosevelt aimed to reinforce federal authority in regulating monopolies and promote fair competition in the economy. This action marked a significant step in his broader progressive agenda to combat corporate abuses.