The subject of this studies is to show the development of the legal institution of protection of the rights and interests of the United States. The institution of the United States Attorney (Attorney General) is derived from a similar solution previously found in England. However, the historical analysis shows that despite the common origin, the Attorney General in the United States has its own history. The aim of the study, and at the same time the research hypothesis, is to show the respect of American politics to the stability of solutions and evolutionary changes, sometimes lasting decades. As a result, a system was created that focuses on the Justice Department, headed by Attorney General. It is the largest law firm in the world, very structurally developed, which protects the rights and interests of the United States extremely effectively