The Constitution established the judicial branch of government with the creation of the Supreme Court. Congress created the other federal courts. All these courts together make up the judicial branch. The courts review and explain the laws, and they resolve disagreements about the meaning of the law. The U.S. Supreme Court makes sure that laws are consistent with the Constitution. If a law is not consistent with the Constitution, the Court can declare it unconstitutional. In this case, the Court rejects the law. The Supreme Court makes the final decision about all cases that have to do with federal laws and treaties. It also rules on other cases, such as disagreements between states.