A critical gun case was argued before the Supreme Court this week. But instead of opening further freedoms for gun owners — as the court, with its conservative supermajority, did in a blockbuster decision last year — justices seemed ready to rule that the government may disarm people under restraining orders for domestic violence.Adam Liptak, who covers the Supreme Court for The Times, explains why.Guest: Adam Liptak, who covers the Supreme Court for The New York Times and writes Sidebar, a column on legal developments.Background reading: