Co-authors of the new book 'The Company They Keep: How Partisan Divisions Came to the Supreme Court,' Lawrence Baum (Ohio State) and Neal Devins (William & Mary SOL), discuss their research on an historically polarized high court, and how divided elite communities drove the Court's partisan schism. Plus, Dr. Adam Feldman (Empirical SCOTUS) queries whether a rightward-shifting Court has driven its chief somewhat leftward.