The government of the United States maintains an enormous number and variety of law enforcement agencies to serve the many categories of federal law. These agencies are outlined in any table of organization that illustrates the executive branch of government. At the top of that table is the president of the United States. Below the president are the secretaries of the executive departments. In most cases, law enforcement agencies answer upward, to the department undersecretary, the secretary, and finally the president of the United States.