Democratic candidates Sens. Elizabeth Warren (D-Mass.) and Kamala D. Harris (D-Calif.), as well as Julián Castro, are arguing for impeachment on the theory that Kavanaugh lied about his past conduct and engaged in sexually abusive behavior. There is certainly merit in the idea that regardless of the Senate’s unwillingness to remove him, the American people should understand just who this justice is, how the investigation of him was rigged and how his elevation to the Supreme Court has sullied the institution. That might figure prominently if and when a Democratic president has the chance to reshape the court.