The process of picking a Supreme Court justice is notoriously secretive. Late-night meetings, myths of White House “shortlists” and trial balloons of potential nominees coming from who-knows-where. It’s the perfect parlor game, and needless to say, Washington loves it. And one name coming up in green rooms and bars might be the combination of the best “what if” discussion and biggest political bombshell: Elizabeth Warren. To liberals, Warren, the Massachusetts ...