In 2020, a disgruntled litigant posing as a deliveryman opened fire at the New Jersey home of District Judge Esther Salas, killing her 20-year-old son Daniel Anderl. Five years later, as President Donald Trump steps up hiscriticism of federal judges who have blocked some of his agenda, dozens of judges have had unsolicited pizzas delivered to their homes, often in Daniel Anderl’s name.District Judge John J. McConnell, Jr. of Rhode Island, who stalled Trump’s initial round of across-the-board spending cuts, is among those who received pizzas in Anderl’s name. His courtroom also has been flooded by threatening calls, including one...