561 U.S. 742 (2010)
McDonald v. City of Chicago is the landmark decision that took District of Columbia v.
Does the Second Amendment right to keep and bear arms, as recognized in District of Columbia v. Heller, apply to the states and their political subdivisions through the Fourteenth Amendment, and if so, through which clause?
Under selective incorporation, a provision of the Bill of Rights applies to the states through the Fourteenth Amendment if the right is fundamental to the American scheme of ordered liberty and deeply rooted in the Nation's history and tradition. The Supreme Court has adopted the Due Process Clause as the vehicle for selective incorporation; the Privileges or Immunities Clause remains constrained by The Slaughter-House Cases. Applying this doctrine, the right to keep and bear arms for self-defense recognized in Heller is fundamental and is therefore fully applicable to the states through the Fourteenth Amendment's Due Process Clause.
Yes. The Second Amendment right to keep and bear arms for self-defense is fundamental and is incorporated against the states through the Fourteenth Amendment's Due Process Clause. The Court reversed the Seventh Circuit and remanded, rendering Chicago's and Oak Park's handgun bans unconstitutional.
McDonald completes the major work of selective incorporation by applying the Second Amendment to state and local governments, ensuring that the core right recognized in Heller—possession of a handgun in the home for self-defense—binds all levels of government. For students of constitutional law, it is a canonical case on the mechanics of incorporation: defining "fundamental" rights, reconciling older precedents like Cruikshank and Presser with modern doctrine, and choosing the Due Process Clause over the Privileges or Immunities Clause as the vehicle for applying enumerated rights to the states. The decision also frames later Second Amendment litigation. Although McDonald did not prescribe a level of scrutiny or a definitive test for all gun regulations, it reaffirmed Heller's carveouts for longstanding, presumptively lawful measures and left regulatory details to be developed in subsequent cases. It simultaneously revived academic and judicial interest in the Privileges or Immunities Clause through Justice Thomas's concurrence, setting the stage for ongoing debates about original meaning, federalism, and the structure of Fourteenth Amendment protections.