At the Supreme Court on Tuesday, justices seemed inclined to uphold a federal law that bans anyone covered by a domestic violence court order from having a gun. But if they do that, the decision will likely be a narrow one, leaving many questions about the future of gun regulations unanswered.NPR legal affairs correspondent Nina Totenberg reports. A note to listeners, there is a graphic description of violence in this episode. Email us at considerthis@npr.org