The United States Supreme Court was created by the US Constitution and established by the Judiciary Act of 1789. The Constitution granted the Supreme Court the power to interpret laws and ensure all parties are treated fairly, but did not define its exact responsibilities. The Supreme Court is made up of a Chief Justice and six Associate Justices who are nominated by the President and approved by the Senate. John Jay was the first Chief Justice, appointed by President George Washington. The Supreme Court has significant influence over American lives through its role interpreting the Constitution and applying regulations to cases.