I have written this Jurisprudence column for Slate.  It begins:

The New Yorker’s Jeffrey Toobin this week revealed  juicy bits from the Supreme Court’s deliberations as it considered Citizens United, the thunderous case in which the court allowed corporations and unions to spend unlimited sums on candidate elections, paving the way for big-spending super PACs.  Toobin told of a secret draft Citizens United dissent by Justice David Souter that has never been released—a draft that Souter, who has since retired, should now make public.