Established the power of judicial review: determines if a law is unconstitutional. Last minute appointment of mr. marbury by john adams. Judicial review: the supreme court"s power to strike down a law or an executive branch action that it finds unconstitutional. District courts: lower-level trial courts of the federal judicial system that handle most u. s. federal cases. Appeals or circuit courts: the intermediate level of federal courts that hear appeals from district courts. More generally, an appeals court is ay court with appellate jurisdiction. Resolve conflicts between state law and federal law, or between laws in different states. Make sure the application and interpretation of the constitution is consistent state wide. Constitutional interpretation: the process of deterring whether a piece of legislation or governmental action is supported by the constitution. Statutory interpretation: the various methods and tests used by the courts for determining the meaning of a law and applying it to specific situations.