For decades, a debate over lifetime appointments in the federal judiciary have pitted those who value freedom from political influence against those who see a need for accountability. The former want to continue the tradition, and the latter want either term limits, retention elections, or a combination of both, as many states have in place now. No serious effort has been made to propose such a system, but perhaps an “exit interview” by the New York Times’ Adam Liptak of retired appellate jurist Richard Posner will prompt one. And it should, as Posner inadvertently makes the best possible case for...