What was the outcome of Marbury v Madison?

Answer 1

1803 decision of this case written by Chief Justice John Marshall established the principle of Judicial Review, meaning that the Supreme Court ultimately has the power to decide if any federal or state law is unconstitutional.

Answer 2

This court case established the process of Judicial Review. In the United States it meant that the Supreme Court could decide the constitutionality of a practice or law without waiting for the case to be petitioned to the Court. It was historical and it was established in the first few years of the US.