Adams administration in 1801 passed a Judiciary Act appointing 58 new judges
This act built off of another Judiciary Act passed in 1789
Marbury and several other Midnight Judges did not receive their commissions and thus were unable to become judges
Marbury sued James Madison to try to evoke a writ of mandamus (get SCOTUS to force delivery of his commission)
SCOTUS ruled that James Madison not delivering commissions was illegal
also ruled that the Judiciary Act of 1789 was unconstitutional
said Congress cannot simply modify the Constitution’s laws like that cause of the Supremacy Clause
established judicial review