Justices Reject, for Now, Missouri's Effort to Override Federal Gun LawsThe move blocked an expansive state law, the Second Amendment Preservation Act, and let stand a ruling that it was an unconstitutional attempt to nullify federal laws.
Source: Justices Reject, for Now, Missouri's Effort to Override Federal Gun Laws (https://www.nytimes.com/2023/10/20/us/supreme-court-missouri-gun-law.html)