What are the sources of law in the United States?

What will be an ideal response?

The foundational source of law in the United States is the U.S. Constitution, which establishes the federal government and enumerates its powers. Powers not given to the federal government are reserved to the states. State constitutions establish state governments and enumerate their powers. Treaties are international agreements entered into with other countries, and are created by the president but must be approved by the Senate. Statutes and ordinances are known as codified law, and are created by legislative bodies. Codified law establishes courses of conduct that must be followed by covered parties. Administrative rules and regulations come from bureaucracies, which are created by the legislative and executive branches of government. Executive orders are issued by the president and state governors, and regulate the conduct of those on whom the executive orders are focused. And, judicial decisions are created by appellate courts that resolve legal controversies. In so doing, an appellate court issues decisions that state the holding of the case and the rationale used by the court in reaching that decision.