Answer:
Marbury v. Madison, arguably the most important case in Supreme Court history, was the first U.S. Supreme Court case to apply the principle of "judicial review" - the power of federal courts to void acts of Congress in conflict with the Constitution.
Step-by-step explanation:
Madison, legal case in which, on February 24, 1803, the U.S. Supreme Court first declared an act of Congress unconstitutional, thus establishing the doctrine of judicial review. The court's opinion, written by Chief Justice John Marshall, is considered one of the foundations of U.S. constitutional law.