Roberts laid out his concerns in his annual report on the federal judiciary on Tuesday. He wrote that even if court decisions are unpopular or mark a defeat for a presidential administration, other branches of government must be willing to enforce them to ensure the rule of law.

Roberts said robust criticism of judicial rulings is part of American civic life, but some recent attacks had gone too far in threatening to undermine the independence necessary f

Chief Justice John Roberts' year-end report caps another tumultuous year for the Supreme Court, which faces calls for ethics reforms.

But John Roberts’s year-end report remains silent on Supreme Court ethics.