Describe the 1803 case of Marbury v. Madison. What was the outcome?

Marbury v. 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.

Explanation:

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.