During the autos-da-fé that now pass for Supreme Court confirmation hearings in the U.S. Senate, it’s common for supporters of a nominee to dismiss attacks from the opposing party as mere partisanship. But, during the recent hearings for Ketanji Brown Jackson, Andrew C. McCarthy—a Republican former federal prosecutor and a prominent legal commentator at National Review—took the unusual step of denouncing an attack from his own side. When Republican senators, including Josh Hawley and Marsha Blackburn, began accusing Jackson of having been a dangerously lenient judge toward sex offenders, McCarthy wrote a column calling the charge “meritless to the point of demagoguery.” He didn’t like Jackson’s judicial philosophy, but “the implication that she has a soft spot for ‘sex offenders’ who ‘prey on children’ . . . is a smear.”

In the end, the attacks failed to diminish public support for Jackson, and her poised responses to questioning helped secure her nomination, by a vote of 53–47. But the fierce campaign against her was concerning, […]