The Sherman Antitrust act was created for that purpose, but it was also supported by the Clayton Antitrust Act which came later on. Roosevelt was known as "Teddy the Trust-Buster" for his strict enforcement of these acts.
Rough Riders
The Rough Riders were the troops under Theodore Roosevelt's command.
The Rough Riders were a volunteer cavalry unit. The unit was made of athletes and cowboys as well as general adventurers. Theodore Roosevelt was put in charge of this group of untrained men who were willing to fight. They were most used in the Spanish American War to take the island of Cuba. The men were recruited from the Southwest and because they were athletic and training in shooting and riding a horse they were useful in the war with little investment from the government.
Win wars was what they wanted students to do