United States v. State of Missouri, No. 23-1457 (8th Cir. 2024)
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In 2021, Missouri enacted the Second Amendment Preservation Act, which declared certain federal firearms regulations as infringements on the right to keep and bear arms and invalid within the state. The Act prohibited state officials from enforcing these federal laws and allowed private citizens to sue state entities that did so, imposing penalties for violations. The United States sued Missouri, arguing that the Act violated the Supremacy Clause of the U.S. Constitution.
The United States District Court for the Western District of Missouri denied Missouri's motions to dismiss for lack of standing and failure to state a claim. The court granted summary judgment in favor of the United States, ruling that the Act violated the Supremacy Clause and enjoined its implementation and enforcement. Missouri appealed the decision.
The United States Court of Appeals for the Eighth Circuit reviewed the case and affirmed the district court's judgment. The appellate court held that the United States had standing to sue because the Act caused concrete and particularized injury by impairing federal law enforcement efforts. The court also ruled that the Act's attempt to invalidate federal law was unconstitutional under the Supremacy Clause. The court found that the Act was not severable, as its provisions were fundamentally interconnected with the invalidation of federal law. Consequently, the injunction against the Act's implementation and enforcement was upheld.
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