The ATF defends the rule as necessary to combat the threat of ghost guns, which are being used in a growing number of crimes across the nation.

The Supreme Court is hearing a challenge to a Biden administration regulation on ghost guns, the difficult-to-trace weapons with an exponentially increased link to crime in recent years

The U.S. Supreme Court is set on Tuesday to consider the legality of a regulation issued by President Joe Biden's administration cracking down on "ghost guns," largely untraceable firearms whose use has proliferated in crimes nationwide.

The Supreme Court is taking the bench again on Monday, ready to hear cases on ghost guns, a death sentence and transgender rights

The rule from the Bureau of Alcohol, Tobacco, Firearms and Explosives seeks to ensure ghost guns are subject to the same requirements as commercial firearms sales.

The government contends that ghost guns kits count as a firearm under a 1968 law. But those challenging the rule contend “a kit of parts is not a weapon.”

The conservative-majority court could yet be asked to intervene in election disputes after the ballots are cast in November.