McCulloch v. Maryland
The constitutional question
Necessary and Proper Clause; Supremacy Clause
The holding
Congress has implied powers beyond those enumerated, and states cannot tax (or otherwise impede) legitimate federal institutions.
Live legislation that raises this case (3)
An act to provide for reconciliation pursuant to title II of H. Con. Res. 14.
McCulloch's broad reading of implied fiscal powers is why Congress can restructure taxes, Medicaid, and energy credits in one act.
GENIUS Act
McCulloch blessed federal architecture for money and banking beyond the enumerated text — the direct ancestor of chartering stablecoin issuers.
Providing congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Environmental Protection Agency relating to "California State Motor Vehicle and Engine Pollution Control Standards; Advanced Clean Cars II; Waiver of Preemption; Notice of Decision".
The supremacy principle McCulloch announced is the constitutional engine that lets a federal resolution nullify a state regulatory program.