Recent rulings in the U.S. have challenged state gun laws in relation to federal authority. A federal judge in Kansas ruled that a ban on machine guns is unconstitutional, stating that the Second Amendment protects such weapons as 'bearable arms'. Meanwhile, the 8th U.S. Circuit Court of Appeals overturned Missouri's Second Amendment Preservation Act, which had prohibited local police from enforcing federal gun laws without a state equivalent, declaring it a violation of the supremacy clause of the U.S. Constitution. The Missouri law had been criticized for undermining federal gun regulations and disrupting law enforcement partnerships. Missouri Attorney General Andrew Bailey has expressed his intention to review the ruling while emphasizing his commitment to defending Second Amendment rights. These developments underscore ongoing tensions between state and federal gun legislation.