Marbury vs. Madison (1803) majority opinion
1. Yes, the writ of mandamus was constitutional.2. It would be absurd if there was no remedy. Writ of mandamus is constitutional, even kind of England would agree.3. Judiciary Act of 1789 did not have constitutional right to change court's jurisdiction - only can be done by an amendment (specific in Art 3). Court has judicial review power b/c having a supreme court would be absurd if they can't judge laws unconstitutional. court takes loyalty oath to constitution.