Judge Brett Kavanaugh’s jurisprudence will appropriately be dissected in the months ahead. I’d like to speak to a less well-known side of the Supreme Court nominee: his role as a mentor for young lawyers, particularly women. The qualities he exhibits with his clerks may provide important evidence about the kind of justice he would be.

I’ve gotten to know this side of Judge Kavanaugh while serving on Yale Law School’s Clerkships Committee for most of the past 10 years. It also affects me personally: Last year my daughter accepted...