As we discussed in reviewing Joan Biskupic’s excellent book on Chief Justice John G. Roberts Jr., he has tried to balance two at times contradictory goals.As Biskupic noted, “Roberts had demonstrated two overriding and often conflicting priorities. One was institutional. He wanted high public regard for the court as an independent branch separate from the other two and cordoned off from politics.The other derived from his interest in changing the court’s role in racial, religious and other social dilemmas …