President Teddy Roosevelt's Square Deal was based on providing a "fair" society in which all citizens could benefit. Within this Square Deal, he focused on protecting the consumer and controlling corporations.
One action he took to protect the consumers was passing the Meat Inspection Act. After the book The Jungle was produced, Roosevelt became aware of the unsanitary working conditions of the meat packing industry. These unsanitary methods resulted in rotten food that made thousands of Americans sick. The law passed by Roosevelt resulted in federal regulation of the meat packing industry.
Another action taken by Roosevelt was taking different corporations to court in order to break up trusts. During the course of his presidency, Roosevelt took on thirty different companies that, in his mind, were acting like monopolies by manipulating a certain part of the market.