NFIB v. Sebelius (2012)
The Supreme Court considered whether the Affordable Care Act's individual mandate was constitutional. The Court ruled 5-4 that the mandate could not be justified under the Necessary and Proper Clause, though it upheld the law under Congress's taxing power.
The individual mandate survived as a tax, but the Court limited the scope of the Necessary and Proper Clause.
The ruling established that a law must be 'ancillary' to an enumerated power, not a 'great, substantive and independent' power.
This is the most recent major Necessary and Proper Clause decision. The home-distilling case will likely further clarify what counts as a 'great and independent' power.
