When I say I believe in a square deal I do not mean [that it is] possible to give every man the best hand…. All I mean is that there shall not be any crookedness in the dealing….All any of us can pretend to do is to come as near as our imperfect abilities will allow to securing through governmental agencies an equal opportunity for each man to show the stuff that is in him...
Theodore Roosevelt's Square Deal were a series of acts he proposed to safeguard Rights. Components of this included the dismantling of monopolies that were unfairly eliminating competition, and the prevention of fraud in the marketplace.
The specific acts included the Elkins Act of 1903 and the Hepburn Act of 1906 which forced the railroad monopolies to divest; the Pure Food & Drug Act and Meat Inspection Act, both from 1906, insured proper labeling of drugs and sanitary conditions for livestock before and after slaughter. The Antiquities Act, also from 1906, gave the president the power to create national parks, instead of having the land so designated by Congress.
His cousin Franklin Roosevelt followed up with his own "New Deal" when he became president in the 1930's, which greatly expanded the power of government.