The judicial branch is established in Article III of the Constitution and has jurisdiction over federal laws, disputes between states or citizens of different states, and disputes involving foreign governments. The lower federal courts include district courts, which handle the majority of cases, and courts of appeals that hear appeals from lower courts. Additional specialty courts include military, territorial, tax, and claims courts. At the highest level is the Supreme Court, which has the power of judicial review to determine the constitutionality of laws but only through cases that come before it. Supreme Court decisions can only be overturned through a new ruling or constitutional amendment.