Book excerpt: On the eve of a presidential election that may determine the makeup of Supreme Court justices for decades to come, prominent attorney James D. Zirin argues that the Court has become increasingly partisan, rapidly making policy choices right and left on bases that have nothing to do with law or the Constitution. Zirin explains how we arrived at the present situation and looks at the current divide through its leading partisans, Justices Ruth Bader Ginsburg and Sonia Sotomayor on the left and Antonin Scalia and Clarence Thomas on the right. He also examines four of the Court’s most controversial recent decisions – Hobby Lobby, Obamacare, gay marriage, and capital punishment – arguing that these politicized decisions threaten to undermine public confidence in the Supreme Court.