The Supreme Court ruled against reinstating Missouri’s 2019 law that barred police officers from enforcing some federal gun laws without state equivalents.

This law imposed fines up to $50,000 on officers who enforced federal restrictions such as those affecting domestic violence offenders and weapons tracking.

The big picture: Lower courts declared the law unconstitutional, citing the Supremacy Clause that federal law overrides conflicting state legislation. • The Supreme Court’s refusal reflects an ongoing judicial stance supporting federal authority in firearm regulations.

Driving the news: The Missouri law was originally motivated by opposition to perceived expansive federal gun control under then-President Joe Biden. • The legal battle strained law enforcement cooperation, as M

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