As the Supreme Court justices race to finish up the current term, they will meet behind closed doors on Thursday to consider whether they should add a blockbuster Second Amendment case to the docket for next term. The focus is a federal law that bars an individual subject to a domestic violence restraining order from possessing a firearm. It has only been a year since the Supreme Court issued a landmark opinion that marked the broadest expansion of gun rights in a decade. Since then, lower courts have been reconsidering thousands of firearm restrictions.