Missouri’s Second Amendment Preservation Act, passed in 2021 and signed by then-Gov. Mike Parson at a Kansas City gun shop, was criticized by local governments, local police and others. The U.S. Justice Department said the law would cause harm to law enforcement and public safety.

Missouri’s controversial gun law that banned local police from enforcing federal gun laws was rejected by the U.S. Supreme Court on Monday, capping a yearslong battle that pitted gun rights advocates against law enforcement.

The court refused to hear the state’s arguments seeking a ruling on whether the state can block police from enforcing federal gun laws, especially if there isn’t an equivalent state law.

The measure, which was championed by the state’s Republican majority, imposed $50,000 fines for officer

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