The U.S. Supreme Court’s conservative supermajority has struck down four decades of precedent which established that judges should defer to federal agencies on interpreting a law if Congress did not specifically address the issue. On Friday, justices ruled 6 to 3 to overturn the legal precedent, known as the Chevron doctrine. Critics call the court’s ruling a major power grab by corporate interests. Justice Elena Kagan wrote in dissent, “In every sphere of current or future federal regulation, expect courts from now on to play a commanding role. It is not a role Congress has given them. It is a role this court has now claimed for itself, as well as other judges.”