How did McDonald v. City of Chicago affect state and local gun laws?

In the 2010 case McDonald v. City of Chicago, the U.S. Supreme Court ruled that the Second Amendment right to keep and bear arms is applicable to state and local governments, not just the federal government.12

The Court reached this decision through the doctrine of "selective incorporation," determining that the Due Process Clause of the Fourteenth Amendment protects the individual right to possess and use firearms for traditionally lawful purposes, such as self-defense, against infringement by state and local authorities.23

By applying this constitutional standard to the states, the ruling effectively limited the ability of state and local jurisdictions to enact laws that completely prohibit or severely restrict the possession of firearms for self-defense in the home. This decision built upon the Court’s previous finding in District of Columbia v. Heller (2008), which had established an individual right to bear arms under the Second Amendment at the federal level.2