Ruth Bader Ginsburg has no need any longer for her “I’m Ruth, Not Sandra” T-shirt. She could, however, use Sandra Day O’Connor’s vote.

O’Connor retired from the Supreme Court last year, replaced by a man. Her departure almost certainly cost Ginsburg’s side a victory in an abortion case, decided 5-4 in April, and might have been a factor in a wage discrimination lawsuit the Court decided last week, also by a 5-4 vote, against a woman and in favor of her employer.