The JUDICIAL Branch interprets the law. Members of the supreme court are appointed by the president and are approved by the Senate.
Major Supreme court Cases
Plessy vs. Ferguson
-Segregation, Separate is equal.
Brown VS. board of education
-Segregation, Separate is not equal.
Miranda vs. arizona
-Police must read a person's rights to them before they are arrested.
Marbury vs. madison
-Judicial Review
Muculloch vs. maryland
-States can't interfere with national interests, constitutional sovereignty, expand congress powers.