Justice Ketanji Brown Jackson, the Supreme Court’s newest member, denounced on Thursday what she described as “relentless attacks” on judges, and an environment of harassment that “ultimately risks undermining our Constitution and the rule of law.”

“ Across the nation, judges are facing increased threats of not only physical violence, but also professional retaliation just for doing our jobs,” said Justice Jackson, speaking at a conference for judges held in Puerto Rico. “And the attacks are not random. They seem designed to intimidate those of us who serve in this critical capacity.”

Justice Jackson did not mention President Trump by name nor cite any specific attacks against the nation’s judges. However, her remarks came as Mr. Trump and his allies have repeatedly targeted judges who have blocked key pieces of his agenda, even calling for judges who have ruled against him to be impeached.

Those calls drew a rare rebuke from Chief Justice John G. Roberts Jr. in March, who described them as “not an appropriate response to disagreement concerning a judicial decision.”

Threats of physical violence against judges have also been on the rise, with judges facing bomb threats and a rash of delivery of anonymously dispatched pizzas, a prank apparently designed to send a message that their home addresses can be found.

The forceful comments by Justice Jackson were rare for the justice. Since joining the court in 2022, she has focused many of her public appearances on telling the personal story of her rise to become the first Black woman on the Supreme Court.