Chief Justice John Roberts warned against personal attacks on the judiciary, telling an audience Tuesday that while criticism of opinions is fair game, “personally directed hostility” is dangerous and must stop.

Roberts did not mention Donald Trump by name and, as he so often does, he went out of his way to stress that the attacks he was referring to were coming from “not just any one political perspective.” However, the chief justice’s admonishment came weeks after Trump said that justices who ruled against his sweeping tariffs were an “embarrassment to their families.”