The document summarizes two Supreme Court cases that expanded the role of the judicial branch:
1) McCulloch v. Maryland (1819) established that federal law trumps state law based on the supremacy clause. It involved a state tax on a federal bank that the court ruled was unconstitutional.
2) United States v. Nixon (1974) determined that executive privilege is not absolute and must be considered in light of the circumstances. It involved the president claiming executive privilege over recordings of oval office conversations requested by the Senate.