That's the name of this article by Si Lazarus and Doug Kendall of the Constitutional Accountability Center. "Broken circuit" is Lazarus and Kendall's characterization of the U.S. Court of Appeals for the D.C. Circuit. They point to "[a] new breed of activism on the .. the D.C. Circuit — for environmental cases second in importance only to the Supreme Court and the central venue for high-profile lawsuits — [that] threatens decades of progress."