Smart Adam Liptak column:

The court seems to have split into two camps, with the four justices at its ideological center working diligently to deliver unified opinions. The remaining members of the court seem less committed to that project.

The recent run of rulings, accounting for more than a quarter of all decisions in argued cases so far this term, tells the story.

The court’s most conservative members — Justices Clarence Thomas and Samuel A. Alito Jr. — wrote eight concurrences or dissents. Its two most liberal members — Justices Ruth Bader Ginsburg and Sonia Sotomayor — wrote four.