Bump Stock Ban Brings Agency Power Dispute to Supreme Court

Guns are back before the US Supreme Court but it’s not a fight over Second Amendment rights.

The case being argued Wednesday involves the reach of a federal statute that bans machine guns and asks if bump stock attachments qualify under the law’s definition.

The dispute is closely watched for its potential to limit the federal government’s ability to interpret ambiguous laws and put a device that was used in the deadliest mass shooting in the US back on the market nationwide.

This case isn’t about whether or not the right to keep and bear arms includes bump stocks, said ...